Cal Test Electronics CTM-26 PVC Automotive Clip Insulator, 3-7/8" Length for Automotive Battery Charger and Trouble Light Clips, Red (Pack of 50) Insulator for automotive battery charger and trouble light clips CTM-24A, CTM-25 and CTM-25C Replacement for Mueller clip insulator BU-26 Made of PVC Temperature: 0 to 60 degree C 3-7/8" Length