The 12 included BOSU trainers slide on their side into slots in the EZ-Reach Cart; no more stacking or stretching or crouching. EZ-Reach Cart is constructed of thick, durable ABS plastic. Choose BOSU NexGen, NexGen Pro, or Elite trainers. Cart also sold separately; easy assembly. 73"L x 16-1/4"W x 60-3/4"H; 30 lb.