1.Grade:J55, K55, N80-1, N80-Q, L80, C90, P110

2.We also supply premium thread products by customer's request

3.Size: tubing coupling from 1.9" to 4-1/2",Casing coupling fro4-1/2"to 13-3/8"

4.Type: NU, EU (tubing coupling), STC,LC,BTC (casing coupling).

5.Surface treatment: Whole phosphating, or inside phosphating and outside coating

6.Packing: By carton, wooden case, wooden pallet, or by requirements of customers Otherwise,

Our company distributes and sells casing and tubing couplings.  If you are interested in anyone of them please contact us as soon as possible.