.1 The ball shall be round and shall have an air chamber with a self-closing valve. It shall be waterrproof, without external strapping or any covering of grease or similar substance.

.2 The weight of the ball shall be not less than four hundred (400) grams and not more than four hundred and fifty (450) grams.

.3 For games played by men, under-21 men and master men, the circumference of the ball shall not be less than sixty-eight (68) centimeters and not more than seventy-one (71) centimeters, and its pressure shall be 50 kPa (kilo Pascals) (13-14 pounds per square inch atmospheric).

.4 For games played by women, under-21 women and master women, the circumference of the ball shall not be less than sixty-five (65) centimeters and not more than sixty-seven (67) centimeters, and its pressure shall be 50 kPa (kilo Pascals) (12-13 pounds per square inch atmospheric).

Goals

.1 Goals will be located over the centre of each goal line with their lower inside edge two (2) meters above the surface of the water. The goals are to be held in such a way that they are prevented from swinging. The goal supports and nets should not interfere with any player defending or manoeuvring around the goal area, or with the flight of the ball in the area of play.

.2 The goals will consist of open frames one (1) meter high by one and a half (1.5) meters wide (measured internally) hung vertically. The maximum width of a material used to construct the goal frame will be five (5) centimeters. The goals are to have nets, which allow the ball to pass freely through the goal frame but indicate clearly that a goal has been scored and should not have back bars. The frame must be red and white striped each stripe being of 20 centimeters length.