body material: Aluminum alloy, Zinc inside nominal diameter: 7-8mm beautiful appearence , high quality and attactive price sealing material: rubber structural style: spring diaphragm main export market: Europe type of attachment: flange Flow: 0.6-1m3/ h P( inlet) : 0.03-1.56MPa P( outlet) : 2.80+ / -0.50 kPa