The Eagle Group DDSK-21 Double-Deep Skate Kit is designed for the Floor-TrakĀ® High Density Storage System, specifically for 21"D shelving. This kit includes three durable aluminum skates, along with all necessary parts and hardware for installation. Each mobile unit requires one kit, supporting a weight capacity of 1500 lbs. per mobile section, with an impressive 3000 lbs. at the middle skate. The product is NSF certified, ensuring it meets strict public health standards. Enhance your storage efficiency with this robust and reliable skate kit.