HellermannTyton Heat Shrink Heatshrink w/o adhesive 612809 - HellermannTyton 309-21903, HellermannTyton's heat shrink part number 309-21903 is a flexible, thin-walled orange sleeve with a shrinkage ratio of 2:1. It is typically used for cable insulation and protection, offering a neat and durable finish. This product is sold by the metre and is ideal for applications requiring non-adhesive heat shrink solutions. HellermannTyton 309-21903 Heatshrink tubing orange 19.1mm-9.5mm 2:1 1m