V3 Material: Synthetic leather. Seam Type: Welded. Chamber Material: Butyl. Weight: 280 grams. Recommended Use: Competition. Circumference Measurement: 67 centimeters. Premium materials ensure stable performance. Precise specifications meet professional training needs. As a standard No. 5 volleyball, it adheres strictly to specifications, making it fully compatible with professional training scenarios. The circumference is precisely measured at 67 cm, meeting the standard requirements for volleyball size in professional training, allowing you to accurately control the ball during training. The weight is set at 280 grams, a scientifically balanced weight that neither adds unnecessary burden due to excessive weight nor compromises feedback, due to being too light.This ensures a realistic and stable feel during various technical drills such as passing, setting, and spiking.