HellermannTyton's heat shrink tubing, model 321-11300, is a robust and abrasion-proof option with a 3.5:1 shrinkage ratio. This black, thick-walled tubing is designed for cable insulation and protection without inner adhesive. It is typically used in applications requiring durable and abrasion-resistant insulation or sheathing. https://elecena.pl/product/28205139/hellermanntyton-321-11300-heatshrink-black-3-5-1-shrink-1m-robust 2025-04-05 https://elecena.pl/product/28205139/hellermanntyton-321-11300-heatshrink-black-3-5-1-shrink-1m-robust 2026-07-10