This is a Signature 10 1/2 X 15 Semi Cleaver for 25-30 HP Yamaha Outboards. It has a removable hub kit. Comes with a Hub Kit The best prop I ever made for small motor, pleasure and race... Hill Marine's Part Number: PH15R3L-123.
With a 118 hub kit this prop works well on a 20-35 Evinrude.
With a 120 Hub kit, this props works well on an 18-25 Mercury. With a 121 Hub Kit, this prop works well on a 25-30 Suzuki. With a 123 Hub Kit, it works real weel on a 20-30 Yamaha.