Large Quantity: the package contains 3 different baseball resistance bands, sufficient in quantity is enough to meet your daily exercise demands; They are helpful to increase running speed by building arm strength, increasing flexibility, throwing velocity, rotational speed, power, distance and accuracy 3 Resistance Levels: the baseball bands have 3 different resistance values, 20 pounds, 30 pounds, 50 pounds, respectively suitable for teenagers ages under 12, high school travel teams, college pro level Comfortable to Use: the pitcher resistance bands contain metal fence clip and wrist cuffs, the metal fence clip is applied to connect to the loop for rod connection when the chain link fence is not accessible, and the wrist straps are comfortable to use without worrying Reliable and Serviceable: these baseball pitcher bands are mainly made of quality latex tube material, stable and lasting, not easy to break and rust, comfortable and reliable to use, serving you for a long time