Available in three sizes these high performance windows provide a degree of protection at a price point for every application and budget. Fits easily and comfortably over required protective spectacles or respirators. Windows are injection molded from propionate for superior performance and are preformed to the exact curve of crown protectors for easy installation an exact fit and a perfect seal against dust dirt and debris. For an extra margin of protection windows are .060 thick yet they cost no more than ordinary .040 thick windows.