Checkers Industrial Safety Products is a global provider of innovative industrial safety products proudly Made in the USA, dedicated to saving lives and protecting assets. Diamondback UHB4045R Polyurethane Modular Bridge system, amp for UHB4045T Tunnel measures 18. 25 x 16 x 5. 5 inches overall and is made from Polyurethane material. Protect cables and hoses: 4.5" diameter. Polyurethane construction for high load bearing capacity. Abrasion, impact and weather resistant; modular interlocking design with multiple tunnel choices. Diamond plate tread surface for increased traction; Yellow caution color for high visibility. Light-weight, easy to transport, setup, breakdown and store; built-in hand holds double as attachment points for mounting brackets. * Protect cables and hoses: 4.5" diameter * Polyurethane construction for high load bearing capacity * Abrasion, impact and weather resistant; modular interlocking design with multiple tunnel choices * Diamond plate tread surface for increased traction; Yellow caution color for high visibility * Lightweight, easy to transport, setup, breakdown and store; built-in hand holds double as attachment points for mounting brackets