Park golf balls are used in the sport of park golf. They have a weight less than 100 grams (3.5 oz) and diameter of 60 millimetres (2.4 in) and are constructed of durable synthetic resins. They may be translucent or opaque and are manufactured in many different colours. Balls from different manufacturers vary significantly in the way they perform contacting the club, flying through the air and rolling on the grass.