This 4 Tiered wedged Seated Choir Riser is constructed from x4 Staging 101™ wedged platforms that align with SEP20, SEP4060 and SEP6080 platforms. Each tier is set at tiered intervals of 20cm, 40cm, 60cm and 80cm. Available in a black or grey carpet finish or black hardwearing, anti-slip finish. Each level is built from heavy duty steel construction and 18mm sandwich plywood offering a sturdy, safe and stable seated riser for your performers. Capable of supporting approximately x11 standard chairs elevated.