Marsblade Hockey Skates blades

Speed enhancing Marsblade skate blades.... used once. Includes runners and holders. White with teal accents. Mars blades holders with 2 sets of steel runners. Nearly new, perfect condition. Size 263mm (7-7.5) skate, size 8-9 shoe. Sport science researched stride efficiency speed study at Brock University showed 5% forward speed increase with these blades. Text 6138626778