The Unico M252 Dual Head Microscope is designed for College Level Instruction and Discovery. The versatile M250 Series offers your choice of Halogen or LED Illuminated Models. Warranty: 5 Year Limited Warranty (1 Year Electrical System Warranty; excludes Bulbs & Fuses). The M250 Series Microscopes have been recently updated with the Reverse Nosepiece, Larger Base and Sturdier Body Construction adding more value for your money. Your choice of Monocular, Dual-view, or Seidentopf Binocular Heads in corded or cordless models. All heads rotate 360ç. Binocular Heads have Diopter Control on One Eye-Tube and Interpupillary Distance Adjustment Settings (55-75mm). Standard M250 Series features include Color Coded DIN Achromatic 4, 10, 40 and 100x Objectives and 10x Widefield Eyepieces. Objectives are mounted on a 4-position, positive click-stop Reverse Nosepiece. All optical surfaces are precisely polished, sealed and coated with anti-fungal, color correction and hardening agents to improve true color viewing while increasing the lifetime of the lenses. Unico M252 Dual Head Microscope Size & Weight: Size: 8.5" x 6.5" x 14.4". Weight: 13 lbs (6 kg). Shipping Size: 12.5" x 8.5" x 16.5". Shipping Weight: 13 lbs (6 kg). Unico M252 Dual Head Microscope Specifications: Illumination: M252: Halogen (6V, 20W). M252LED: LED. Head: Dual Head. Eyepiece: 10x WF (2). Objectives: 4x, 10x, 40x, 100x. Condenser: NA 1.25. Diaphragm: Iris. Stage: Mechanical. Focusing: Coaxial. Unico M252 Dual Head Microscope Literature: Unico Basic Laboratory Microscopes Brochure Unico M250 & M280 Basic Lab Microscopes Brochure