Brand: KAYSEN Size:8mm to 273mm Pressure:0.5 mm to 28 mm Standard:ASTM A554,ASTM A312,A249,A269,A778,JIS G3459,JIS G3466 Material:TP304/L/H, TP316/L/H, TP317/L, TP321/H, TP347/H,310/S, TP409,TP410,TP430, 904L and UNS S31803, UNS S32304, UNS S32750 Certificates:API and ISO,BV, PED97/23/EC certificate.