Raychem ZH2 and ZH4 Highly flame-retardant, low recovery temperature, ZEROHAL heat-shrinkable tubing DESCRIPTION:Black commercial-grade heat-shrinkable tubing ? ZH2 is a standard wall, flexible polyolefin tubing available in metric sizes from 0.8mm to 30mm ? ZH4 is a thin wall, very flexible polyolefin tubing available in metric sizes from 0.6mm to 10mm APPLICATIONS: Commercial Electronics Rail and Mass Transit Automotive Elevators Construction