The Random Heli Blade Buddies BB-600 fits most 600 size main rotor blades, even wide chord blades like the VTX models. The table below shows several popular 600 class main blades. The column labeled Var +/- indicates the amount of excess length you can expect on blades shorter than 610mm as well as the amount of blade root (near the blade grip) that will remain exposed on blades longer than 610mm (but because Blade Buddies are made from stretchy neoprene, they will actually cover any blade in the list below).