Features: Single element glass lens Vinyl case included Heavy-duty frame  

Features: Impact-resistant plastic frame Optical-quality acrylic lens

Features: High-quality, optical, color-corrected glass lenses Precision-machined aluminum frames

Features: High-quality, optical, color-corrected glass lenses Precision-machined aluminum frames Machined from zinc

Features: High-quality, optical color-corrected glass lenses Precision-machined aluminum frames