Rapid ECH0244B Stopcock - 3 Way, PP is a polypropylene leakproof stopcock with a PTFE plug and serrated tubulations that accept 6-8mm tubing. * 3-Way Stopcock * Accuracy as per din 12700,ISO 385. Class B * Capacity 50ml * Sub. Div. 0.10ml * Tolerance ± 0.10ml