Features Durable Rubber Construction - Made from high-quality rubber, these bulbs are resistant to damage, ensuring long-lasting use in your laboratory or school experiments Exceptional Airtight Design - Featuring uniform texture and strong flexibility, these bulbs provide a secure seal, preventing leaks and ensuring accurate sampling every time Advanced Manufacturing Process - Crafted through a meticulous process of vulcanization, these bulbs have enhanced durability and reliability, making them ideal for various laboratory applications Excellent Resilience and Flexibility - Designed to retain their shape under pressure, these bulbs offer outstanding resilience, insulation, and water resistance for versatile usage Versatile Chemical Resistance - These bulbs are engineered to withstand oils, acids, and alkalis, making them suitable for a wide range of experimental applications without compromising integrity Features: 1、 and made of rubber, it is not easy to be damaged and can be used for a long time. 2、The workmanship is beautiful and generous, with uniform texture, strong flexibility, and high airtightn. 3、It is made by pasting four pieces of film to each other, then pasting and vulcanizing the film, valve nozzle and valve core. 4、Not easy to deform, rubber has excellent resilience, insulation, water resistance and plasticity. 5、Rubber bladder has valuable properties such as oil resistance, acid resistance, alkali resistance, heat resistance, cold resistance, prure resistance, and abrasion resistance. Specification: Item Type: Rubber Squeeze Bulb Material: Rubber Purpose: laboratory gas collection Tube Outer Diameter: Approx. 9mm / 0.4in Tube Inner Diameter: Approx. 6mm / 0.2in Thickn: Approx. 0.8-1mm/0.03-0.04in Package List: 2 x Rubber Squeeze Bulb Note: betweendiv>1. Please allow 1‑2cm error due to manual measurement. Thanks for your understanding.between/div>betweendiv>2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.between/div> Package List 2 x Rubber Squeeze Bulb