--- product_id: 106927154 title: "FastRack Drilled Rubber Stopper (#10-3 Pieces) | Solid Rubber Stopper Bungs for use with Fermentation Airlock | Durable Carboy Bung |Tapered Bung for Corking Home Brewing Glass Carboys" brand: "fastrack" price: "94 zł" currency: PLN in_stock: true reviews_count: 10 category: "Fast Rack" url: https://www.desertcart.pl/products/106927154-fastrack-drilled-rubber-stopper-10-3-pieces-solid-rubber-stopper store_origin: PL region: Poland --- # Tapered leak-resistant seal 3/8" precision drilled hole BPA-free lab-grade rubber FastRack Drilled Rubber Stopper (#10-3 Pieces) | Solid Rubber Stopper Bungs for use with Fermentation Airlock | Durable Carboy Bung |Tapered Bung for Corking Home Brewing Glass Carboys **Brand:** fastrack **Price:** 94 zł **Availability:** ✅ In Stock ## Summary > 🍺 Seal your brew, not your fate—lock in freshness with FastRack! ## Quick Answers - **What is this?** FastRack Drilled Rubber Stopper (#10-3 Pieces) | Solid Rubber Stopper Bungs for use with Fermentation Airlock | Durable Carboy Bung |Tapered Bung for Corking Home Brewing Glass Carboys by fastrack - **How much does it cost?** 94 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/106927154-fastrack-drilled-rubber-stopper-10-3-pieces-solid-rubber-stopper) ## Best For - fastrack enthusiasts ## Why This Product - Trusted fastrack brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durability Meets Safety:** Crafted from BPA-free, lab-grade natural rubber, built to withstand heat and wear for long-term brewing success. - • **Secure & Slip-Resistant:** Tapered design with curved lip guarantees a snug, leak-proof seal that won’t slip into your carboy during fermentation. - • **Versatile Compatibility:** Perfectly sized for 3 to 6.5-gallon glass carboys and large plastic jugs—ideal for homebrewing, winemaking, and cider crafting. - • **Trusted Quality Assurance:** FastRack’s commitment means if your order isn’t perfect, they’ll make it right—brewing peace of mind included. - • **Precision Fit for Fermentation:** Drilled #10 stoppers with exact 3/8" hole for standard airlocks ensure flawless CO2 release without oxygen intrusion. ## Overview The FastRack Drilled Rubber Stopper (#10, 3-pack) is a premium, BPA-free natural rubber bung designed for home fermentation. Featuring a precise 3/8" drilled hole for standard airlocks and a tapered, slip-resistant design, it ensures an airtight seal on 3 to 6.5-gallon glass carboys and large plastic jugs. Durable and heat-resistant, these stoppers provide reliable performance for brewing, winemaking, and cider projects, backed by FastRack’s quality guarantee. ## Description Size 10 Drilled Rubber Bung (3 pack) Review: Works great - Excellent fit for my five gallon water jugs Review: This fits the big plastic water jugs 6 gallon - Just the rite fit ## Features - WHAT'S INCLUDED: With this purchase, you'll receive a set of 3 #10 rubber stoppers, each featuring a precisely drilled 3/8" center hole to accommodate standard fermentation airlocks. The tapered design ensures a snug, leak-resistant seal, while the built-in curved lip prevents the bung from slipping into the carboy. Ideal for use with large glass fermenters in homebrewing, winemaking, cider making, and other fermentation projects. - FOOD-SAFE & DURABLE: The FastRack carboy airlock stopper is made from BPA-free, lab-grade natural rubber. Designed for long-term use, these stoppers offer strong sealing performance with excellent heat and wear resistance. Compatible with 3, 5, 6, and 6.5-gallon glass carboys. - OUTSTANDING FEATURES: FastRack rubber stoppers drilled provide excellent grip and are air-tight on glass and other surfaces. Our tapered shape designed stoppers stay in unlike other less expensive rubber stoppers. Our high quality allows you to use our product with confidence! - HOW IT WORKS: Plug the carboy stopper into the mouth of your carboy or fermenter and then insert the airlock. This will create an airtight seal that prevents oxygen contact during fermentation. The airlock will then let CO2 escape while preventing oxygen from going back into your brewing vessel. - OUR COMMITMENT TO YOU: At FastRack, we stand behind the quality of our products and the trust our customers place in us. Your experience matters. If your order arrives damaged or incomplete, reach out—we’ll make it right. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01LPRP4BG | | Best Sellers Rank | #49,421 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #26 in Lab Rubber Stoppers | | Date First Available | September 7, 2016 | | Item Weight | 6.4 ounces | | Item model number | B01LPRP4BG | | Manufacturer | FastRack | | Product Dimensions | 4.5 x 4.4 x 1.9 inches | ## Images ![FastRack Drilled Rubber Stopper (#10-3 Pieces) | Solid Rubber Stopper Bungs for use with Fermentation Airlock | Durable Carboy Bung |Tapered Bung for Corking Home Brewing Glass Carboys - Image 1](https://m.media-amazon.com/images/I/316JBUwRKeL.jpg) ## Questions & Answers **Q: What is the physical size???** A: These are not "ideal" for all 5gallon water jugs! Does not fit Primo 5 gallon walmart jugs! Get a smaller size for them! **Q: What OD tubing will work best to fit snug on the center hole? 3/8 or 5/16?** A: Thanks for asking. 3/8in OD tubing fits in the hole but may be a bit loose. Therefore, 7/16in OD tubing will provide a tight seal despite taking some effort to squeeze in. **Q: does this fit a gallon carboy?** A: No. You will want a universal or 6.5 stopper for a one gallon jug. **Q: What is the hole diameter in the stopper** A: The stoppers I received had holes approximately 3/8 inch in diameter. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great *by V***Y on December 10, 2025* Excellent fit for my five gallon water jugs ### ⭐⭐⭐⭐⭐ This fits the big plastic water jugs 6 gallon *by J***E on November 21, 2025* Just the rite fit ### ⭐⭐⭐⭐ Hole for bubbler too small *by S***D on February 9, 2021* The quality is great but the size of the hole where the bubbler goes is way too small. I am just going to drill it out to make it bigger. ## Frequently Bought Together - FastRack Drilled Rubber Stopper (#10-3 Pieces)| Solid Rubber Stopper Bungs for use with Fermentation Airlock | Durable Carboy Bung |Tapered Bung for Corking Home Brewing Glass Carboys - Fastrack Airlocks for Fermenting Bubble Airlock for Wine Making and Beer Making BPA-Free S-Shaped Airlock used for Brewing Wine, Beer, Pickles & more Transparent Airlock Set Of 3 - Five Star - 6022b_ - Star San - 32 Ounce - High Foaming Sanitizer --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/106927154-fastrack-drilled-rubber-stopper-10-3-pieces-solid-rubber-stopper](https://www.desertcart.pl/products/106927154-fastrack-drilled-rubber-stopper-10-3-pieces-solid-rubber-stopper) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-26*