Pair (2) Propellers for sale. -3 Blade / Aluminum / 15 Spline - 15 pitch / Thru Hub Exhaust (approx. 13" dia. ) According to 'Go2Marine' (boat propeller fit guide) fits: (equiv. Part number 1411-135-15) -Merc / Force / Yamaha / Mariner Sizing in the 40-125hp range (check chart for your year/size/model) -15 Spline (approx. 1"ø main input shaft) -Pitch: 15 (both?) -approx. 13" diameter -Length (approx. 6-/12") Both of these are in good shape. Will be hard to find when you finally need one (or two?). Regardless....boating season is coming very quickly. come and get 'em!....you might need a spare in mid season.