CAT55 1/2" thick x 7"OD x 3.125"ID for 2.75" Pin color may very between black an
CAT57 3/4"thick x 7"OD x 3.125"ID for 2.75"Pin, color may very between black and
CAT51 1"thick x 7"OD x 3.125"ID for 2.75"Pin, color may very between black and w