Product : Pipe couplers (Pipe clamp) Steel grade : SPFH540 Size : 48.6*48.6 / 48.6*60.5 / 60.5*60.5 Pipe couplers are our flagship items since Hory has been producing it in 2010. Currently supplying it to several countries as 'Japan', 'Thailand', 'Russia', 'Cambodia', 'Vietnam', 'Philippines' as well as 'U.S.A'.