yes, plastic. black plastic.
some did have metal, including the Packard supplied motors to Hudson for the hornets, which is where i got my metal one to replace the crappy plastic one.
metal one that i got from a hudson pump. top pic
black plastic as in this NOS one, bottom pic, i broke the plastic one trying to take apart the pump. then i put this NOS one on....and broke the housing, so i had to take it back apart and it broke again with barely any pressure on it.
i said forget that and got a metal one, just so happens hudson ones had metal and i found one on ebay...so i caniblized it and used the blade only.
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