Amazon.com: PET Plexiglass Sheet/Panel 24" x 36" x 0.04" - Pinziren 3 Pack Large Acrylic Glass Alternative, Plexi Protector Cover for Door, Craft Projects, Pet Barriers, Railing Guards, Clear 24x36 x 1mm :
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Amazon.com: 4 Pack 12" x 12" x .12" Clear Acrylic Sheet with Blue Protective Peel-Off Covering, Plexiglass Sheets, Highly Versatile, Light Weight and High Impact Strength, Acrylic Glass, Made in USA :