As strong as those on the market at double the price 20mm metal high quality welded structure, the most durable on the market! 6 adjustable extraction socks (max 315mm). 6 adjustable intake socks (max 250mm). A possibility of separating into two spaces (growth and flowering) completely sealed velcro fasteners. 18 lamp holders available. 4 carbon filter supports. Easy to assemble the structure. Assembly in 45 minutes. 3 people required. High reflection mylar, 97%. Washable and 100% lightproof. Dimensions: 600x300x220cm.