The connector is made of Metal zinc alloy and the strap is made of rubber, This model For GST-B200, GBA-800, GMA-B800,GMA-810 ,GA-800 ,GBD-800 ,G GBX-100 ,DW-5600 ,GW-M5610 GW-B5600 ,G-5600 DW-5600BB ,DW-5600 ,DW-9052 ,GMA-S110, GMA-S120 ,GMA-S130 , GMA-S140 ,GA-900, GM-110, GA-400 GBA-400, GA-700 ,GA-710, GA-100 ,GW-6900, DW-6900 ,GM-6900. GWA-100 G-8900/GLS-8900/GR-8900/GW-8900 GD-100/GD-110/GD-120/GA-150/GA-300/GLS-100/GD-350/GA-110/GA-100/GA-120/GA-200 and other styles.