3M Tubing & Molded Parts (Catalog Number: BBI7ARD50') is a heavy-duty heat shrink tubing with a shrink ratio of 1.5 : 1. It has an overall length of 50 ft (15.24 m) and an operating temperature range of -55 °C to 110 °C (-67 °F to 230 °F). The tubing is made of polyolefin material and comes in orange and red colors. It is suitable for use in bus bars and has a voltage rating of 5 kV, 8 kV, 15 kV, 25 kV, and 35 kV. The rectangular size ranges from (4 x 1/4) to (4 x 3/4) inch for 35 kV and (4 x 1/4) to (6 x 3/4) inch for 5 kV, 8 kV, 15 kV, 25 kV. The square size is (2-1/2 x 2-1/2) inch for 25 kV and (2-1/2 x 2-1/2) to (3 x 3) inch for 5 kV, 8 kV, 15 kV. It has an inner diameter before shrink of 13 in (330 mm) and after shrink of 8.28 in (210 mm). Its recovered wall thickness is 0.13 in (0.048 in expanded). The tubing can withstand a maximum operating temperature of 110 °C (230 °F). It is not halogen-free and does not have UL approval. - 7100025927