I'm not saying that Star never made a Lubesizer with cast iron parts, but most of the lubesizers made by Star.......long before Magma Engineering got into the picture were made with a number of cast aluminum parts....and no cast iron parts. As I have said, I have owned seven different Star Lubesizers, some of them quite old, and seen many others, and none of them had any cast iron parts..... I have seen at least four different variations of Star Lubesizers, and there very well could be more. Star used a lot of cast iron in their reloaders so it wouldn't be a total suprise it they used cast iron in a Lubesizer at some point, but I'm sure we would all be very curious to see pictures of one with cast iron parts.