Rebar Dia(mm): 16, 18, 20, 22, 25, 28, 32, 36, 40 Thead Size(mm): M19*2.5, 21*2.5, M23*2.5, M25*2.5 M29*3.0, M32*3.0, M36*3.0, M39*3.0, M45*3.0 Coupler dia(mm): 25, 29, 32, 35, 40, 44, 50, 56, 62 Coupler length(mm): 32, 36, 40, 44, 50, 56, 64, 72, 82