AK8010 Neoprene service kit for the Whale Henderson Chimp 1 pump. This Whale pump diaphragm measures 140mm in diameter and has a 55mm hole spacing. The Whale pump repair kit contains the following pump spares: 1 x Adhesive, 1 x Inlet valve plate, 1 x Outlet valve plate, 1 x Neoprene diaphragm, 1 x Inlet valve, 1 x Outlet valve, 4 x Nut (Assembly), 4 x Screw M5 x 25 and 4 x Circlips.