size:1.315''-20''

steel grade:J55, K55, N80-1, N80-Q, L80, P110，Q125,13Cr-80,13Cr-110,super13Cr

thread type: NUE,EUE,SC,LTC,BTC. VAM series、HYD、JFE、 Hunting series  thread for replacement clasp

Surface treatment: surface using phosphate or black finish, painted again.

package: in wooden case, in bundles

length: 2FT,3FT,4FT,5FT,6FT,8FT,10FT,12FT,15FT,20FT

type: PIN X PIN, PIN X BOX, According to the drawing process