Amazon.com: SPRI Dead Weight Slam Ball - Durable Sand-Filled No-Bounce Heavy Duty Ball for Tossing, Slamming, Core Strength Training, Endurance, and General Fitness - Easy to Read Weight Label - 15 lb :
SPRI Elite Xercise Ball at SwimOutlet.com
Spri Soft Mini Xerball Medicine Ball
Slam Ball – GetACTV
Amazon.com : SPRI Xerball Medicine Ball with Handles - Weighted Ball for Exercise (6 lbs, 8, 10, 12, 14, 16, 18, 20 Pounds) - Med Ball for Abs, Core, Strength Training - 8 Pound : Medicine Balls : Sports & Outdoors