MIL-DTL-23053/12-312-0 4FT mil-spec heat shrink tubing

M23053/12 is a PTFE heat shrink tubing that is chemical resistant and works well in high temperature applications and tough environmental conditions. M23053/12 has an operating temperature of -67°C to 250°C and classes 1-4 have a 2:1 shrink ratio and class 5 a 4:1.