This is the rebuild kit for the Dubro #334 Fueling Valve for glow fuel systems, DUBQ0650. It may also be used to convert the #335 gasoline fuel valve for use with glow fuel. This set includes all the moving and sealing parts of the valve to enable it to be restored to "like new" operation. Includes: Complete instructions for disassembly of the original valve and installation of the new components. (1) valve spring (1) large black O-ring and (1) small black O-ring (1) shuttle - the piece that moves inside the valve to divert incoming fuel to the tank and seal the valve when filling is complete. (1) 1/2" diameter round nut for holding the valve assembly in place Requires: Nothing else required 3/2/97 RDT updt jxs 1/13/04