The Hypro D503 Diaphragm Pump Kit 1881 is a kit that works for both the 9910-D503 & D503GRGI. The Hypro D503 Diaphragm Pump Kit 1881 includes 3 Diaphragm Desmopans and 6 o-rings.
Application: repair kit
Use on: 9910-503 & D503GRGI