905410 (Febco) | 4 Inch | 860 RP First And Second Check Rubber KitThis Rubber Parts Kit Includes All The Parts Necessary to Repair or Replace All Rubber Parts Required For The Check of a 4 Inch Reduced Pressure Zone Assembly, Series 860. All Parts Are Genuine And Original to The Valve. Kit Includes 2 Jam Nuts, 4 O Rings, 2 Washers, 2 Check Discs, 2 Seat Ring Gaskets, 4 Bulkhead Fitting Gaskets, Sensing Line Gasket, Bearing Socket, And RV Collar Febco 905410