2 year old tempered safety glass (ideal for balconies, green houses etc.) 6 mm thick, 60 lbs each ($200 plus new). Ideal for 3'x 6'. applications Mostly 38" x 67 1/2" and 38" x 68 1/2' and 38 x 70 1/2. A few odd different sizes. Delivery negotiable. Prices are $40 for the first 5 sheets, $30 after that.