Sand casting for impeller Materials: ASTM B30-92 C95200 C87800,B763-90 C95800 ... timeAlso the material of stainless steel 304,304L,316,316L impeller and pump bowls can be provideOur products export to USA, ... Canada and KSA for 5 yearsShandong Alldohua International Trading Co.,Ltd Andy ... Shandong,ChinaTel:0086-18653371891 Fax:0086-533-3155455 pump impeller