The 300-30640 is a black Heat Shrink Tubing made of thin-wall cross-linked polyolefin and offers 2:1 shrink ratio. The HIS-PACK-6.4/3.2 PO-X BK 5 flexible tubing provides a reliable insulation and protects against corrosion and mechanical in?uences. The tubing is used in general purpose of electrical insulation with a high level of protection against corrosion and mechanical abrasion.