Name: Rebar Coupler Spec.: aa16, aa18, aa20, aa22, aa25, aa28, aa32 Steel Gr: 45#Gr Name: Rebar CouplerSpec.: φ16, φ18, φ20, φ22, φ25, φ28, φ32Steel Gr: 45#GrProcess: Parts are made of fine rolled steel pipes and with the process of Cutting Rebars--Boring--Striping Ex Circle--Finish Turning The Bottom Hole--Countersik--Testing--Packing Rebar Coupler