These fantastic and durable comb attachments fit most hair clippers. The steel spring is heat treated for durability and lasts longer than plastic clips. Make sure you make the original red comb your choice! Sizes: 0 - 5/16" (7.9mm). Speed-O-Guide is the "Original Red Comb" for use with virtually all clipper makes and models. Available in six sizes. Speed-O-Guide's superior-quality plastic combs are both flexible and strong. Create the latest looks in flat tops, crew cuts, buzz cuts, tapering, layering, texturizing and more. houseofbeautyworld.com offers only the highest quality products, allowing customers to shop with confidence.