For item no. 36080 â?¢ Frosted glass â?? reduced light level â?¢ Double glazed - high insulation level â?¢ Structure and internal frame grey Technical data: â?¢ Cutout size: 500 x 500 mm â?¢ External dimensions: 600 x 600 mm â?¢ Roof thickness: 26-100 mm â?¢ Height above roof: 110 mm â?¢ Weight: 5.8 kg