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Luer stopcocks are available in different materials and sizes. You can purchase luer stopcocks made of polycarbonate, PVC, black PVC, Nickel-plated Brass, 303 stainless steel (SS), or chrome-plated Brass. PVC offers great corrosion resistance, whereas stainless steel manifolds are high durability. Not sure which material you needvisit the cole-parmer chemical compatibility database to determine the best material for your application. Stopcocks are available in 1-Way, 2-way, 3-way and 4-way version, which refers to the number of patterns the fluid can travel through the Stopcock. High-pressure polycarbonate stopcocks are rated to pressures up to 1050 psi. Most other stopcocks are only rated to 45-60 psi. Have a question about luer stopcocksour highly trained application specialists are ready to provide you with additional product specifications, guide you through selecting appropriate luer stopcocks, and offer support throughout the operational life of the equipment you purchase. Build leakproof fluid handling systems exceptional durability easy to disassemble for cleaning Stopcock handles turn 180° autoclavable.