Enhance your workout with SKLZ Core Wheels (Pair) Lightweight and portable. Ideal for core strength. Pair of lightweight, rolling wheels for plank, push-ups and pillar exercises Made of polypropylene and polypropylene materials Wheels move together for safety and ground control Features ergonomic foam handles for cushioned grip and comfort Destabilizes movement to target shoulders, torso and hips Non-slip wheels can be used on all surfaces Recommended for all fitness levels Includes training guide to get you started Product Dimensions: 9.5” L x 6” W x 9.5” H Product Weight: 3.5 lbs