Aluminum Alloy Speed Breaker Aluminum Alloy Speed Breaker Made of aluminum alloy, these bumps offer high resistance to severe impacts. They have a load-bearing capacity of up to 75 tons. Acrylic reflectors fixed on the front and back help identify the location of the speed breaker from a long distance.Dimension:Length: 380mmWidth: 330mmHeight: 55mmTotal Nos of Piece in a Meter: 3 Nos.