Are you looking for a professionaland practical dropper rubber bulb for easily transferringliquid? If yes, look no further! Our product must meet you needs. It is made of premium silicone material, durable and sturdy for long-lasting use. Fine workmanship ensures its practicality and durability. Features -Color:Red -Material: Silicone-Size:3.70X1.20X1.20cm/ 1.45X0.47X0.47 in.- Not only suitable for professional research institutions, but also suitable for personaluses. - Made of wear-resistant material, durable for use, not easy to change color, crack or break.- It is simple in design and practical in use, give you a pleasant using experience.- Provide enough quantity for you to use, easily meet your differentneeds.- A helpful tool for most glass pipette to safely and conveniently transfer liquids, greatly save your time and efforts. Packing list: 50 x Dropper Rubber Caps