RD-T008-4x2 (2-step staircase)

RD-T008-4x3 (3-step staircase)

RD-T008-4x4 (4-step staircase)

RD-T008-4x5 (5-step staircase)

RD-T008-4x6 (6-step staircase)

RD-T008-4x7 (7-step staircase)

RD-T008-4x8 (8-step staircase)