Official Size and Weight: you will receive 1 pack rotation softball training aid, size and weight of an official 12" softball, so you can practice exactly how you play, provide correct and timely feedback, avoid the repetitive errors that occur when the player or coach can't see the rotation of the real softball, help improve training efficiency Practice Pitching Skills: this softball trainer will help you learn proper spin for rise, curve, screw, change up, drop and overhand throw ball; Learn correct rotation for Rising, Drop, Screw, Change Up, Fastpitch, and Overhand Throwing; Teaches the proper technique of coming over the ball for the overhand throw as opposed to the sidearm release Durable Material: Our pitching spinner is made of PU material, which is strong, thick and resilient. The non-slip edge design provides a good grip for the pitcher and simulates the real pitching action. It is strong and durable and can be reused many times. Non Slip Edge Design: rotation softball training aid there are 2 sets of molded seams on the edge to give the pitcher a realistic feel of the ball and make you have a good understanding of the position of your hands and wrists, practice like a pro pitcher and avoid spraining your wrist from incorrect repetitive motions Nice Gift: this rotation softball training aid is ideal for daily training and teaching of softball, which also be a good choice for warm up before game; You can give it as a gift to your friend and family, such as softball beginners, softball players, and softball enthusiasts Feature: It will provide correct and timely feedback, and avoid the repetitive errors that occur when the player or coach can't see the rotation of the real softball, teach correct pitching technique, and improve training efficiency. Size and weight of an official 12" softball, provide correct and timely feedback, help improve training efficiency by eliminating repeated errors while an athlete, coach, or catcher can not see the softball rotation. Basic information: Quantity: 1 Material: PU Color: yellow Size: 12 inches Package include: 1 x Softball Training Equipment Notes: Manual measurement, there may be slight differences in size. Due to the screen display, the color of the item may differ slightly from the picture.