18 L X 18 L * Provides Flat Sitting Surface And Eliminates The Hammock Effect Associated With Traditional Wheelchair Seats * Made Of Lacquered Finished Plywood * Corners And Sides Are Rounded To Prevent Chipping * Makes An Excellent Sitting Surface When Combined With A Pressure Relief Cushion * Splinter Free Plywood * Weight Capcity : 300 Lbs *