The near-zero halogen content of Zerohal ZH2 and ZH4 heat-shrinkable tubing makes them especially suitable for applications that require low toxicity materials. The products boast high flame retardance properties as well as a low recovery (or shrink) temperature. Each product is available in black and offers commercial grade performance. ZH2 has a standard wall thickness and has good flexibility attributes. ZH4 is a thin-wall product with a higher degree of flexibility.