Tip N' Roll bleachers are perfect for auxiliary seating requirements! The unit easily tips up on its casters for convenient storage. Frames are 100% welded aluminum angle; seat planks are anodized. Foot planks are double wide for increased comfort. The high-grade swivel casters & rubber foot pads will not mar your floors. 5-year limited warranty. QUICK SHIP! FT-TR327: 3 rows; 27'L x 30"H x 60"D; 352 lbs., single foot plank, seats 54 FT-TR421: 4 rows; 21'L x 30"H x 81"D; 398 lbs., single foot plank, seats 56 FT-TR421P: 4 rows; 21'L x 30"H x 81"D; 524 lbs., double foot plank, seats 56 (Picture is of 3-row, 15'L, double foot plank bleachers.) Call our customer service to order colored seat planks (red, royal blue, navy blue, or forest green); ALSO QUICK SHIP!