AR1816 Support Ring Kit – Annovi Reverberi / AR North America. Kit for Pumps with 22mm bore, like the XR and RK series pumps. AR 1816 Contains 3 of 840320 support rings. http://www.shopetsonline.com/AR1816-Support-Ring-Kit-from-Annovi-Reverberi-p/ar1816.htm
