1、The propeller blade has 3 sharp blades, which can quickly cut the water surface and advance forward, greatly reducing the water resistance. 2、The joints of the propeller blades are made of pure copper, with 12 spline teeth links, which better match the engine speed. 3、Higher rake angles tighten the vortex produced by the propellers, adding to boat lift and overall performance, improves handling and boat lift through aggressive rake and cupping. 4、The propeller is forged by high density aluminium alloy, the surface has been painted and brushed, very smooth and clean, very hard, salt and corrosion resistant and durable. 5、Can be used to replace or repair damaged propellers for better propulsive performance for your outboard engine. Item Type: Propeller Blade Material: Stainless steel + copper Propeller Diameter: Approx. 31.12cm/ 12 1/4in Pitch: Approx. 22.86cm/ 9inNumber of Blades: 3pcs Number of Tooth: 13pcs Rotation Direction: RH Application: Used for replacement, refurbishment, repair, upgrade, etc. of the original model Fitment: Replacement for Outboard Engines 25-60HP Replacement for 3-1/4in Gearcase Replacement for 25hp Bigfoot(4 stroke)...1999-2005 Replacement for 30hp Bigfoot(4 stroke)...2010-newer Replacement for 30hp(2&4 stroke)...1994-2005 Replacement for 30hp(sea Pro/Marathon)...1994-newer Replacement for 35hp...1984-1989 Replacement for 402&500 Models...1974-1984 Replacement for 40hp(2&4 stroke/not bigfoot)...1977-newer Replacement for 40hp(Sea Pro/Marathon)...1977-newer Replacement for 45hp...1986-1989 Replacement for 48hp(Mariner)...all years Replacement for 50hp(2&4 stroke/not bigfoot)...1977-newer Replacement for 55hp(Mercury/Sea Pro/Marathon)...1995-newer Replacement for 60hp(4 stroke)(not bigfoot or Sea Pro/Marathon)...1978-newer Replacement for 60hp(2 stroke)...1978-newer Replacement for 70hp(Model 700)...1983 Replacement for Force40/50hp...1995-1998 Replacement for 70hp...1991-1995 Replacement for 75hp...1996-1998 1 x Propeller Blade 1 x Adapter Bush