CNBTR 3/8" Silver Metal Sealing Clip Clamp Screw Compressor Hose Clamp Laboratory Supplies Latex Tube Clip Pack of 2 Size: 3.5 x 3 x 1.5cm / 1.38 x 1.18 x 0.59"(L x W x T) Metal material, durable and long life. Latex Tube Clip with a 3/8" knurled thumb screw. Compressor clamps are used to control the flow in flexible tubing. Applies to: Used in experiments to hose seal.