Specifications: 1) Dimensions: φ40, 50, 60, 48 x 42mm 2) Frequency: 8.2, 1.95MHz, 58, 66KHz, or customized 3) Color: black, gray, white, or customized 4) Lock: three or four ball clutch, standard, super Outer packing: 500 - 1,000pcs/carton