The Sandwich J-Cups are built tough for heavy-duty performance — a must-have when training with a safety squat bar or pushing serious weight.Their beefy sandwich design, abrasion-resistant HDPE lining, and sloped backing protect both you and your barbell during intense re-racking sessions. 60 mm Version Fits 60 mm racks, cable towers, and non-B.o.S. 60 mm × 60 mm racks with 5/8" holes Thick HDPE padding protects your barbell 880 lb combined capacity Hydra Version Fits Hydra racks and non-B.o.S. true 3" × 3" racks with 5/8" holes Thick HDPE padding protects your barbell 1,000 lb combined capacity Manticore Version Fits Manticore racks and non-B.o.S. true 3" × 3" racks with 1" holes Thick HDPE padding protects your barbell and uprights Includes quick-locking mag pins and internal HDPE lining for added rack protection 1,000 lb combined capacity IMPORTANT:Choose the correct Sandwich J-Cup version for your power rack’s upright size and hole diameter. Sold in pairs.