lol its cool, i used that stuff in the late 90's (a black plastic of a machinable grade) lucky you! i'll wager to guess its for the camera industry
aah i miss delrin, those days gone by when mat'l flexes a bit,
ppl i need some more problems to solve! IM BORED come on, want z rough answers? or 3d cut? im so bored sry i dont do srm or true mill
4140 pre hard, the hardest subtance known to man, exept for inconel, monel, hasteloy, and secret government crap.