1. Heat wire material: heat wire adopt nickel chrome, constantan, manganese, copper alloy, copper, nickel, zinc copper alloy etc.
2. Heat wire types: silicone spiral heating wire, silica gel multi-fiber heating wire, silicone single-core heating wire.
3. The structure of: heat wire winding on the glass fibre, the outer package with silica gel.
4. Product test standard: UL758 standards about hair hotline.
5. Bending test of products: more than 5000 times, without exception (test standards in accordance with UL, IEC)
6. Products of curved around test: more than 25000 times, without exception (test standards in accordance with UL, IEC)