Specifications

in case of high temperature or fire doesn't produce the toxic gas
internal layer preserve heat and outer layer againest damp

Flexible hose used laminated foil sticking around high elasticity for steel wire spiral strength and toughness, in case of high temperature or fire does not produce toxic gas.

The flexible hose outer insulation from the heat insulation of footwear, fiberglass insulation, the outermost layer is a damp-proof foil.

Muffler insulation flexible hose intermediate stamps pores, can absorb air noise of footwear from outside of glass fibre insulation and heat insulation, the outermost layer of aluminum foil bears moistureproof.

Rectangle with flexible duct insulation laminated foil sticking around high elasticity for steel wire spiral strength and toughness, outer footwear from the role of glass fibre insulation and heat insulation, the outermost layer of aluminum foil for moisture-proof.