This is a real nice original cast iron pulley for a Monitor hit and miss gas engine. It is in excellent condition with no cracks, breaks, or repairs of any kind. It has a 6 inch face and is 6 inches in diameter. It mounts to a 5-spoke flywheel with two holes 3 3/4 inches apart on center and those holes are 6 1/4 inches apart on center to the far one. It likely fits on several sizes of Monitor engines so please measure your engine to be sure it works for your application. It will fit on any engine with an adapter plate. It would look great on an unrestored engine! These original cast iron pulleys are rather tough to find in the wild or even at swap meets and they really set an engine off! They also make it possible to run belt driven implements with your engine. If you’ve been looking for one to complete a restoration here’s your chance. This one is ready to be put to work on an engine or put into your inventory for a spare. The pictures tell the story. You won’t be disappointed in any way. I can be reached at 262 573 193 1 if you’d like to talk abou it.