- 12 oz MAXX - 2X THE WEIGHT WITH SAME BOUNCE, SLIDE & CONTACT HEIGHT AS AN ICE HOCKEY PUCK: At just over 8 oz (228 g), the MAXX is almost double the weight of the Smarthockey ORIGINAL Training Ball and feels 2X (12oz) as heavy as an ice hockey puck. The contact height 1.09" which is less than one tenth of an inch higher than an ice hockey puck. The added weight combined with the roll and contact height of the MAXX ball strengthens a player's wrists simply by stickhandling and shooting it.