I've got this 4-blade stainless prop that came off of my 1998 Yamaha 30 2-banger. It also fit my 2001 merc 25 2-banger. I think it's a custom made prop. It's about 9 3/8" diameter, 9" pitch with heavy (double) cup. I just needed more pitch, my yammi is bouncing the rev limiter with this thing at about 31 mph. Asking $150 obo. It's in like new condition.