2011 Newest Practice golf hollow balls: Hollow golf balls suppplier and exporter, ideal for batting practice 1> Diameter: 42.8mm, weight: 5g 2> Material: PE ( Poly Ethylene) 3> Color: White / any color 4> Using: Suitable for all kinds of driving range, and FLOATING also 5> Place: Both indoor and outdoor Our other products: Plastic hollow balls, floating golf balls, range golf balls, tournament golf balls, color golf balls.