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  .