Specifications:114.3~339.7mm,WT5.21~22.22mm(4 1/2"~13 3/8") Thread:(STC),(LC),(BC) Length: less then R1 (4.88m) 6-5/8"24168.288.94PSLBPSLBPSLBPSLB1,2,3,4,5,6……2810.59 -PSLBPSLBPSLB7"23177.88.05PSLBPSLBPSLBPSLB269.19PSLBPSLBPSLB -2910.36 -PSLBPSLBPSLBP—— blunt end ,S——STC,L——LC,B--------BCcommon difference OD common difference is+1%D~-0.5%DWT common difference is-12.5%