Ultra thick 6.3 mm MR10 GE lexan polycarbonate (or equivalent). High quality, scratch resistant All hardware (nuts & bolts) is stainless steel with black-coated finish...no rust! Versatile tilt mechanism for refreshing cabin ventilation: closed, half extension and full extension Unique quick-release top windshield piece: in just a few seconds, simply remove the top piece to allow for refreshing air flow. No tools required!!! ALL OUR ITEMS ARE OF THE HIGHEST QUALITY AND WITH MANUFACTURER'S WARRANTY, WE ARE RESPONSIBLE FOR ALL OF THEM Some parts require installation in workshops as sometimes they require adapting connections. We recommend installation in workshops. Some of the items, including this one, may not be available, so if this were the case, we would notify the purchaser in writing.