Our premium Soft Rubber Stoppers (size 2) with 1-hole are perfect for various laboratory and DIY applications. Specifically designed for 50 mL Erlenmeyer and flat-bottom flasks, these size 2 stoppers are made from high-quality, non-greasy rubber with a durometer of 45, ensuring a snug fit and excellent durability. Each stopper features a single hole, making them ideal for venting or inserting tubing.
 
Features
 
High-Quality Material: Soft, non-greasy rubber for reliable sealing.
Fits Perfectly: Designed for 50 mL Erlenmeyer and flat-bottom flasks.
Precise Dimensions: Top diameter of 20mm, height of 25mm, bottom diameter of 16mm.
1-Hole Design: Ideal for venting or tubing applications.
Convenient Pack: Approximately 53 stoppers per 1-pound pack.
Durable: Duromet