Binoculars flip up loupes Dental and surgical loupes 4.0x 5.0x 6.0x with ifferent working distance 340mm 420mm 500mm 550mm Uses a prism system, which offers very clear image. Camber hinge offers comfortable view angle. Prism system give you a wider field of view with maximum magnification. Flip-up, dental loupes & surgical loupes, offer the maximum ease of use, combined with multi-functional capabilities, Available in a variety of magnification & working distances - black carrying case - light-weight frame - side shields - flip-up handle - head band - micro-fiber cloth - screwdriver Packing size: length width height : 210x140x80 (mm) Weight (includes loupes , the standard accessory, packing): 230~250 grams