All blades are stamped from Brass and feature a Deep Cup. Also they have a reflection hot foil under the paint to enhance light reflection. All blades feature a 3-D eye and all are UV cleared for maximum shine and durability. These durable blades spin at low speeds to entice trophy strikes. No. 3 Colorado blades. Per 3. Nickel back colors: (019)Purple Tiger, (206)Dick Tracy, (209)Cotton Candy, (210)Pot O’ Gold, (214)Tequila Tiger. Gold back colors: (031)Emerald Tiger, (032)Lady Bug, (050)Purple Dragon, (241)Motor Oil Shad, (251)Ruby Rose.