PTFE-keys with thread_bore 4 mm， NS 14.5 and 3 part retaining device

bore 2 mm， NS 12.5 and 3 part retaining device bore 2.5 mm， NS 12.5 and 3 part retaining device bore 2.5 mm， NS 14.5 and 3 part retaining device bore 4 mm， NS 14.5 and 3 part retaining device bore 4 mm， NS 18.8 and 3 part retaining device bore 6 mm， NS 18.8 and 3 part retaining device bore 6 mm， NS 21.5 and 3 part retaining device bore 8 mm， NS 24 and 3 part retaining device bore 10 mm， NS 29.2 and 3 part retaining device