- Applicable to the edge of the door, the sides of the sliding door rail, the height difference of the entrance and exit can be improved, the A-type brick is suitable for the obstacle height of about 2.5cm or the A + B type brick can be combined to fit the barrier with a height of about 4.5-5cm. - Provide wheelchair access to the door, reduce the pressure on workers to lift or push the wheelchair, and prevent accidental injuries to the waist and wrist - Two sizes and designs, can be combined to stack a variety of situations - Rubber material, width can be cut according to user's needs