Variety of premium materials: Chrome (9Cr 1Mo L-80, 13 Cr, 25Cr, Alloy 28), Nickel alloys (718, 825, 925, etc), K-500 Monel, 17-4 PH, and 316SS. Full range of premium thread connections from Tenaris, Vallourec (VAM) and Hunting is available upon request. Differential offers a broad selection of special elastomers (AFLAS, Viton, HSN, etc.) along with non-elastomeric seal stacks for improved sealing solutions.