The Gilbert ® Helix Match Netball is a high quality ball ideal for schools or clubs with outdoor courts, with the use of Duragrip - a pebble like grip that gives good handling properties that's suited to longer lasting outdoor courts. Size 5 is recommended for players aged 11 years old and over. Inflate using standard pump (not included). Product Care: Check PSI before each use. Avoid rough surfaces. Do not sit on balls. Rotate balls in your kit to ensure even usage. Inflation: Pull into shape, moisten needle, inflate to recommended PSI.