... (J55, K55,N80, L80 and P110), six sizes (1.9", 2-3/8", 2-7/8 ", 3-1/2", ... two categories (nonupset and external upset) and six sizes (1.9", 2-3/8", 2-7/8 ", 3-1/2", ... " and small caliber) of insulated tubing, and six items in total. The annual production capacity of high-vacuum tubing is 200 thousand meters, and ... --3 1/27.70-3.50088.90.2165.49PNPNPN-9.209.300.2546.45PUNPUNPUNPUN10.20-0.2897.34PNPNPN-12. ...