Sumitomo Electric Industries, Ltd. B2F2-1/4X200 Tubing

Sumitube B2F2-1/4X200 Tubing from Sumitomo Electric Industries is a 1/4-inch nominal-diameter, 200-foot spool of heat‑shrinkable polyolefin tubing available in brown, blue, or yellow. Part of the SUMITUBE B2 family, this single-wall, irradiated polyolefin tube shrinks to about half its pre‑shrink diameter with a 2:1 shrink ratio when heat is applied, delivering electrical insulation and environmental protection for wires, splices, and small terminations. The tubing is UL/CSA recognized and rated for temperatures from -55°C to 125°C, making it suitable for automotive wiring harnesses, electrical enclosures, and electronic assemblies exposed to heat or moisture. Typical applications include insulating spliced cables, bundling and protecting harness sections, and shielding exposed leads in power supplies or control panels. Commonly sold in 200-foot lengths, Sumitube B2F2-1/4X200 provides a ready-to-use solution for on‑site repairs and new installations that require durable, reliable insulation with consistent shrink performance.