concrete pump hose is mainly used to convey highly abrasive concrete in concrete placement industry, such as buildings, bridges, tunnels, beams, mining reinforcement, subways and swimming pools, etc. But for the sizes and working pressure above, we could provide you with customer-made products, welcome to your inquiry. Specification of concrete pumping rubber hose:  Material:rubber+steel/wire Inner layer: NBR compound synthetic rubber; Outer shell: NBR+CR; Working Pressure:15bar Safety factor: 5:1 Recommended For:High-pressure concrete pumping Markets:Construction, Cement Placement Tube:Abrasion resistant synthetic rubber Reinforcement:2”-3” two braids high-tensile steel wires, 3 1/2”-5” four layers spiral