These highly polished 1 1/16" dia. standard soft core (case hardened) standard carbon steel balls dont retain magnetism and can be used in machines with magnets. Less expensive than chrome steel balls, they can be used in all standard pinball machines. More finely polished than standard BRF (bright finish) OEM carbon steel pinballs, these carbon steel pinballs are custom made to our finish specifications (1.0 micro inch "RA" or "mirror" finish) and are only available from Bling Pinballs.