Two-ply nylon-wound construction so balls stand up to the toughest in-class and after-school play. Durable balls will retain their grip and bounce for years. Bright colorful balls stand out and are easy to find. Six-color set includes one each blue green orange purple yellow and red. Two-ply nylon-wound construction. Durable. Bright and colorful. Six-color set includes one each blue green orange purple yellow and red. Global Product Type: Playground/Gymnasium Sets. Color: Blue Green Orange Purple Red Yellow. Diameter: 8-1/2. Material: Two-Ply Nylon-Wound. Playground/Gymnasium Sets Type: Ball.