Great for all abilities and endorsed by Bowls England World Bowls and the English Indoor Bowls Association. These balls have no internal weight but act just like a professional bowl on most flat surfaces such as school halls or leisure centres. This game is a mirror image of Lawn Bowls but much more versatile. The set contains:4 Red.4 Blue.1 Yellow jack.1 Foot mat.1 Carry case.Plastic foam.Ball weight: 200g (total weight 1700g)Ball diameter: 10cm.Bag dimensions: 49cm x 41cm.Not suitable for children under 3 years.