Annual spare kit for the Blagdon Koi Air 50/65 pond air pump. Contains all major parts to complete a service of your air pump. The Blagdon annual service kit includes all likely parts to service your koi pond air pump. Contents: 1 x Intake foam seal, 1 x Intake foam, 1 x Cover lid seal, 1 x Outlet foam seal, 4 x Flapper valves, 2 x Diaphragm front boards, 2 x Diaphragms, 2 x Diaphragm back boards, 4 x Diaphragm protective teflon washers, 1 x set Outlet Foams set of 3.