Ordered 2 because one that came in the compressor wasn't cut to fit properly and split not long after receiving it. Figured these might be the same. However these are cut and sized perfectly, fitting in flat beneath the grease pot. They also feel like a better quality rubber.
75hrs on my CS4 and this diaphragm has been my only issue with it.
Black Diaphragm Rubber Disc for CS4 grease pot
$10.00
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