Bench Top Dual-Bend Beta Radiation Protection Shield, 10" x 18". Important Cleaning Note: Should the acrylic surfaces of acrylic products need cleaning, DO NOT USE ANY SOLVENTS OR ABRASIVES (alcohol, acetone, etc...) USE OF THESE MATERIALS WILL CAUSE CRACKING OR CRAZING OF THE ACRYLIC. For general cleaning wash the surface with a mild detergent and soft cloth, then rinse thoroughly with clean water.