hotel card lock RF21 NP/GP material: zinc alloy or stainless steel hotel using or home using chip: T5557 or Mifare1 hotel card lockRF21 NP/GP nickel plated/gold platedmaterial: zinc alloy or stainless steelhotel using or home usingchip: T5557 or Mifare 1opened by cardavailable color: PVD gold, gold plated, chrome plated, nickel plated, stainless steelpacking:1set per box, 6sets per carton