Avon Protection Vision Correction Assembly Eyeglasses Black/Transparent One Size. These gas mask glasses are designed specifically for spectacle wearers delivering a fully integrated design. Specifications for Avon Protection Vision Correction Assembly Eyeglasses: Manufacturer: Avon Protection Frame Color: Black Lens Material: Transparent Condition: New Horizontal Frame Measurement: 46 mm Vertical Frame Measurement: 37 mm Features of Avon Protection Vision Correction Assembly Eyeglasses Diopter powers ranging from -8 to +10 A flexible design that allows these ballistic glasses to fold inside the mask Adjustable lens height without the need for special tools. Package Contents: Avon Protection Vision Correction Assembly Eyeglasses Avon Protection 70501-155: Vision Correction Assembly Eyeglasses Black/Transparent One Size