Ophthalmoscope Head 3.5v Standard Opthalmoscope Sets Includes:Back Shell Back Shell Hardware Style:1 Pair (Left & Right) Includes:Back Shell Back Shell Hardware Back Cane Hardware Cover Foam Pad Air Insert Lateral Air Inserts Foam Insert Dual Wrench Lumbar Support Pad (select models) Repair Kit Hand Pump Product Registration Card Quick Set Up Guide and Operation Manual * Construction: Back Shell: Aluminum Back Shell Hardware: Zytel© with an aluminum Sliding Height Adjustment Bar Back Cane Hardware: Bracket and pins are aluminum * Pivoting Cane Band and Adjustment Cylinder are steel * Cover: Front side is 100% polyester 2 in 1 product converts from a 2 foot by 8 foot folding mat to a 2 foot cube * Use to develop gross motor skills * Head Only * Apertures include: micro spot small large fixation slit and red free filter * Halogen light for true tissue color and consistent long lasting illumination * 6 apertures for all general and specialist use * 28 lenses 25 to +40 diopters for better resolution * Rubber brow rest prevents scratching of eyeglasses * Illuminuated lens dial clearly identifies setting * Replacement lamp WA03000 *