JONEX Throw Ball. Material : Rubber | Core/Bladder Material : Butyl | Construction Type: Hand Stitched | Number of Panel : 18| Waterproof: 18 panel stitched construction Better grip and all weather resistance. Suitable for Competitions In-Box Contents: 1 throwball.Throwball is ideal for beginners and training, throw Ball is ready to take your game to the streets. Designed to withstand the street game with a durable outdoor rubber cover. Features include deep black channels for expert handling on the court and all-ball pebbling for a good grip.