My office is close to their warehouse. I went there today and bought some 1/8" x 3 x 36 sheets. Very nice quality, very light. It is too late to go to the garage and weigh some sheets, but they seem very light. Tomorrow I will go back to buy some more 1/4" and 3/16" I need for my next build. Call them and tell them you need light material. No extra charge for it.