Falken Design 12 in. x 48 in. x 1/4 in. Thick Polycarbonate Clear Sheet Falken Design PC-1-4/1248 - The Home Depot
Amazon.com: Polycarbonate Sheet - 24" x 48" - 12mm thickness - Good Glass Alternative used in POP Signs/Displays, Skylights, Pool Enclosures, Machine Guards - UV Stabilized, Low Flammability & Burglary-Resistant : Industrial
How Thick Should My Polycarbonate Sheets Be? | Roofing Megastore