Extension rods, there are R22, R25, R28, R32, R38, T38, T45, T51, ST58, T60 threads, and different lengths of rods are available from 600mm to 6400mm usually.
Steel grade: 20CrNi3Mo equivalent to SANDBAR 64
SIZE: hex.22mm .hex.25mm, hex.28mm. hex.32mm hex.35mm
Dia.32mm. dia.38mm, dia.45mm dia.51 mm
Thread: R22, R25, R28, R32, R38, T38, T45, T51, ST58, T60
Length: 0.4m-10m
Package: in wooden case or in bundles.
Productivity: 20000MT / month