Description 3/8″ Inch Flipper Rubbers Used originally on: Gottlieb/Premier 38-13151, 38-10802 Early Bally A-13151 Early Williams 23A-6505 Inder Zaccaria  Black – Low bounce / 50 durometer.  NR – Made of real rubber from rubber trees Blue – Medium bounce / 45 durometer – NBR / High quality polyurethane material Modern Red – Medium bounce / 45 durometer – NBR / High quality polyurethane material Old Style Red – Medium bounce / 45 durometer – NBR / High quality polyurethane material Purple – Medium bounce / 45 durometer – NBR / High quality polyurethane material Green – Strong bounce / 40 durometer –  NBR / High quality polyurethane material Yellow – Strong bounce / 40 durometer. NBR / High quality polyurethane material 7 Different colors – Black… Dark Black rubber – Blue… Blue rubber – Green… Original on many Gottlieb – Modern Red… The perfect match for your DMD games – Purple… Rock’n Roll… – Old Style Red… The classic choice – Yellow… Lights up your playfield Reference: SPF 10-100-Color Gottlieb 38-13151, 38-10802, Bally A – 13151 Williams 23A-6505