MORE HIGH QUALITY:Replacement shaving head and knife blade with hypoallergenic silver foil head with anti-collision technology. Item length:1.38 inches [Affordable]:2 packs, affordable price, so you can use more convenient Fit model:This single replacement foil and cutter is compatible with Andis No.17150 Pro foil shaver. When the foil and cutter become dull, it can be replaced How to use:Replacement package includes hypoallergenic gold foil and gold blade assembly designed to get the closest shave possible without pain or irritation