... :Single conduction heating cable:1, materials: copper alloy,2, number of core: 13, screen: dual layers (copper coil shielding + aluminum foil ... ):18Dual conduction heating cable:1,materials: copper alloy,2,number of core: 2,3,screen: single layer (copper coil shielding)4,sheath: ... 4260017.29155.62800 / / /16.13166.73000 / / /Description:1,safety,2,comfortable and health.Heat the human body from the feet ...