general silicone rubber hose have good flame resistance and resistance to ARC, commonly used for high temperature and high pressure wire insulation protection. for the non-toxic and insipid  of Food grade  silical gel ,commonly used for water cooler,steam pipe and medical appliances's pipe connection.

Features of common wire bellows and conduit:
1. Materials: PVC, PP, PA .silicone rubber
2. Specifications: Φ4.5*7, Φ7*10, Φ8*11, Φ9.5*13, Φ11*14, Φ12.5*16, Φ15*18.5, Φ17*21.2, Φ19*25, Φ22.5*28, Φ25*30, Φ28*34.5, Φ34.5*42.5, Φ46*54.5.
3. Good flexibility. The temperature range between -40°C--180°C depending on different materials.

Properties:the ability of high and low temperature tolerance ,non-toxic and in sipid.