Clamp, Safety, Adjustable, Fits Joint Sizes 45/35 & 45/50. The safety clip is a two piece adjustable clamp used to secure standard taper joints. Made of polyoxymethylene, the clip has excellent chemical resistance. They will not corrode or scratch the glass. Can be used to 150°C. Sold in packages of 10. PLEASE NOTE: THESE CLAMPS CAN BE USED WITH STANDARD TAPER JOINTS THAT HAVE A CG-136 STYLE PTFE SLEEVE BETWEEN THEM.