"METIS FITNESS SLAM BALLS SPECIFICATIONSWEIGHTS AVAILABLE:Slam Ball Weights: 3kg (7lbs) | 5kg (11lbs) | 7kg (15lbs) | 9kg (20lbs) | 12kg (26lbs) | 15kg (33lbs) | 20kg (44lbs) | 25kg (55lbs) | 30kg (66lbs)Light Set: Includes 5x Slam Balls (3kg-12kg | 7lbs-26lbs) & 1x RackHeavy Set: Includes 5x Slam Balls (12kg-30kg | 26lbs-66lbs) & 1x RackComplete Set: Includes 1x Slam Ball for each weight (9x balls in total: 3kg-30kg | 7lbs-66lbs)Complete Set + 2 Racks: Includes 1x Slam Ball for each weight (9x balls in total: 3kg-30kg | 7lbs-66lbs) & 2x RacksDIMENSIONS:Storage Rack:Footprint of rack – 135cm H x 58cm W x 63cm D | 53in H x 23in W x 25in DDistance between each tier (1-4): 28cm | 11inDistance between bottom tiers (4-5): 32cm | 12.5inMATERIALS:Balls are manufactured using heavy-duty tyre tread for long-lasting performanceUltra-durable rubber shell is specially designed to cope with high-velocity impactsPatterned PVC exterior provides excellent grip even when wetExtra-strong steel gym ball rackBlack powder-coated steel rack - for durability & longevityMISCELLANEOUS:Slam balls are bounce-resistant for user safetyBalls can be easily cleaned using a damp cloth to ensure excellent hygiene is maintainedIdeal for developing core strength, shoulder, back, arms & leg muscles & more"