OUR VERY BEST BLADES EVER MADE with SPECIAL PLASTIC THAT WILL BEND. BEFORE IT WILL ACTUALLY SNAP. Bolt hole centers fit models that are. This is a very expensive and special plastic that is rock hard.It will bend like metal before it snaps. Same plastic they make ballistic knifes from! They are 28 long each. Fits on older AirX models, Hornet and Wind Scorpion models. VERY FAST BLADES - LIGHTNING QUICK. This item is in the category "Home & Garden\Home Improvement\Electrical Supplies\Alternative Energy Supplies\Wind Power Supplies\Wind Turbines & Kits". The seller is "wind_turbine_generator" and is located in this country: US. This item can be shipped worldwide.