The cs-850 8x50 binocular from vivitar features a center focus porro prism design with multicoated lenses. The cs-850 is a full-sized, cost-effective, take-along-everywhere binocular. Features: Adjustable Measurements: 7.9 Height/Inches, 7.6 Length/Inches, 3.2 Width/Inches Base Material: 80% Plastic, 20% Glass Country of Origin: Imported