Krimpa-Seal Heat Shrinkable Butt Splices ideal for auto, industrial and marine use. Clear sleeve allows connection to be checked. For user reference the connector's AWG wire size is printed on the tubing. Non-Corrosive, meets MIL-I-23053/4, Class 1, AMS 3634 and UL File E157227. Internal adhesive seals and protects wires. Mfg. # KS5-20