NITRA pneumatic fittings and valves are for use with polyurethane and nylon tubing. ME and MS male straight and male elbows come in 5/32 and 1/4 in. MEL long male elbow fittings come in 5/32 and 1/4 in. with #10-32 threads. MSR push-to-connect male straight round fittings come in ten sizes ranging from 5/32 to 1/4 in. and 4 to 6 mm. HVU three-way hand valves come in seven sizes from 1/4 to 1/2 in. and 6 to 12 mm. CVU union check valves range from 5/32 to 3/8 in. and 6 to 8 mm. Stop valves range from 5/32 to 1/2 in. and 6 to 12 mm diameters. Tubing cutter is for use with 1/8 to 1/2 in. and 4- to 12-mm flexible plastic tubing.