... etc.LengthLess Than 12mSteel materialQ195 → Grade B, SS330,SPHC, S185Q215 → Grade C,CS Type B,SS330, SPHCQ235 → Grade D,SS400,S235JR,S235JO,S235J2StandardBS ... Western UnionOthersFitting as screws and flange also can be supplied. high quality low cost square steel pipe