SIKOU30 Homehold String Professional Trainer Elastic Rope Rebound Practice Tennis Training Ball
คุณสมบัติเด่น / รายละเอียดสินค้า:
| Diameter: | 63.5-66.7mm |
| Elasticity: | 138--147cm |
| Weight: | 56.7-58.5g |
| Advancing deformation: | 0.23-0.27N |
| Material: | High quality rubber and woolen |
