Winnwell Weather Street Hockey Balls 3 Pack 

• Mixed density balls and perfect to use in all temperatures
• Tough, durable, and long lasting balls that don't split in normal play
• 65mm diameter
• Weight 50 grams
• Red - Hard Density - Hot weather +20°C
• Orange - Medium Density - Warm weather up to 20°C
• Yellow - Soft Density - Cold weather below 0°C