Williams/Bally Flipper Extension Spring 10-364$ 0.64 Add to cart Categories: Door Locks, , Fabric&Fleece Backdrop, Sound Healing The most common flipper return spring. Also used as a target reset spring in many drop target assemblies. Williams/Bally reference #10-364. Related products DBC500 STRETCHY Direct Fit CV Boot Kit DBC600 STRETCHY Direct Fit CV Boot Kit DBC400 STRETCHY Direct Fit CV Boot Kit CV Joint Grease Satchet