51PCS Replacement for Cricut Blades with Housing for Cricut Machines of Maker, Explore, Explore Air, and Explore Air 2 The color-coded replacement blades come in 3 different sizes for different materials Red-cap blades (45 degree) are designed to cut light weight to mid-weight materials such as paper, vinyl, stickers, thin cardstocks and thin fabric Yellow-cap blades (30 degree) are designed to cut light-weight materials such as window tint, film and rice paper. It is perfect for kiss-cut Blue-cap blades (60 degree) are designed to cut thick materials such as Fabric, thin leather, Magnets, Foam sheets, chipboards, poster board, heavy cardstock, stiffened felt and more color:Red+blue+yellow+gold Material:Metal Package Contents: 10 x Yellow Covered 30 Degree Light Cut Blades 30 x Red Capped 45 Degree Standard Fine Tip Cutting Blades 10 x blue capped 60 degree deep cutting blades 1 x Gold Fine Tip Blade Case Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.