Gray TPR corner bumper for shopping carts or other barrow Itme No.: CB-3 Materail: Gray TPR. Specifications: 1) Size: 4-1/4 x 4-1/4" 2) Thickness: 1" 3) Height: 1-1/16" 4) Gray TPR 5) Steel insert OEM and ODM orders are welcome.12 years of export experience, professional manufacturing technology, and a strict quality control system.