Small Pop Bumper Spring$ 0.95 Add to cart Categories: Door Locks, , Fabric&Fleece Backdrop, Sound Healing This spring sits between the pop bumper base and the underside of the pop bumper skirt on almost all brands of pinball machines. Williams/Bally reference #’s 10-7 & #A-10430. Stern/Sega/Data East reference #266-5048-00. Related products CV Joint Grease Satchet DBC400 STRETCHY Direct Fit CV Boot Kit DBC600 STRETCHY Direct Fit CV Boot Kit DBC500 STRETCHY Direct Fit CV Boot Kit