This listing is for one 351M/400 3 groove crankshaft pulley and mounting hardware. This was removed from a 1978 Ford F250 4x4 with power steering. Pulley is in good used condition and measures 8" across and is about 2.25" deep. This is the pulley that uses the small/narrow smog pump belt. There are a couple of small nicks on the outer rim of the large pulley. Form and function won't be affected but it is just something I noticed, see pics. It will clean up nice. Questions gladly answered.