3M Tubing & Molded Parts (Catalog Number: HDBB-340-1-250) is a black, semi-rigid, flame retardant polyolefin product. It has an inner diameter before shrink of 35.6 mm (1.4 in) and an inner diameter after shrink of 19.1 mm (0.75 in). With a maximum operating temperature of 135°C, it is also UV resistant and has a dielectric strength of 10 kV/mm. This cable and wire accessory is designed for both indoor and outdoor use, featuring a 3-way outlet style. The outer diameter before shrink is 81.3 mm (3.2 in), and after shrink, it is 50.8 mm (2 in). - 7000132580