custom made for me good grade plywood 1/2 sides  with1/4 inch inter wall insulated. floor 1/2 plywood  1/4 plywood  top  insulated screws and water proof glue. frame steel bolted welded. Indoor carpet  .1/2  foam floor covering. Powered  vent in roof  led light too . set up for solar power has  80 watt Pannel with regulator need hookup. powered vent .have title l4wc1h813ka201036 lightly used tv with wall mount . vent cover  .drink holder all wired  1 7/8 inch ball   painted and coated wit FLEX SEAL rubber  .  HAS 20 FOOT POWER CORD AND BATTERY BOX