The EVERLAST Speed Bag Bladder Model #4230 is a high-quality heavy bag designed for training in boxing, martial arts, and MMA. Made by the reputable brand Everlast in the United States, this red speed bag bladder is a durable and reliable training tool. With a unit quantity of 1, this product is perfect for athletes looking to improve their speed and accuracy in their punches. The compact design makes it easy to use in a variety of training settings, whether at home or in the gym.This speed bag bladder is mad for 4200-4204 punching bag. It is made of space-age polyester urethane # ps62 plastic, size 8" x 6"