• Contains 50 rubber stoppers for droppers • Made of durable, abrasion-resistant silicone • Dimensions of each stopper: 3.70 x 1.20 x 1.20 cm • Provide a sufficient quantity to meet different laboratory needs • Suitable for personal use in laboratory environments • Red color • Do not fade, tear, or break easily • Simple and practical design for easy use • Allow safe and efficient aspiration and transfer of liquids with glass pipettes • Save time and effort when handling liquids • Useful tool for most glass pipettes • High-quality silicone material for prolonged and reliable use