"This set of two EZ-ACCESS® TRANSITIONS® solid rubber modular ramp risers are ideal for reaching heights up to 4.75"". Use the risers with two individual TRANSITIONS® ramps to create a flexible solution for overcoming higher thresholds and short steps. The risers and ramps can be trimmed down, when necessary, using built-in size guides. Naturally slip-resistant recycled rubber construction provides excellent traction in any conditions both indoors and outdoors. It features a weight capacity of 850 lbs."