If you are looking for virtually unbreakable, this Lexan XL10 sheet has 250 times the impact strength of glass and 30 times that of acrylic. With a proprietary UV-resistant surface treatment on both sides that protects it from weathering, it also has up to 25% better thermal insulation than single-panel glass. And, at only 15% the weight of double-panel glass, a Lexan XL10 sheet requires less structural support than either glass or acrylic. It is well suited for all types of vertical glazing and overhead applications such as skylights, covered walkways and replacement windows for screen doors. Specs are: 0.118" thick / 1/8".