Dermagran®–B Nonsterile Hydrophilic Wound Dressing, 3 oz., 1 Each Diagnostic Accessories Offered in multiple lengths for Suction and Aspiration Systems Offered in multiple lengths for a more precise fit 0mm specula * Pocket Ophthalmoscope features: 5 aperture selections (small aperture large aperture fixation aperture semicircle aperture and red free filter) * 17 lenses from 20 to +20 diopters for better resolution * Illuminated dial * Silicon coated protection of glass components * Built in lens dust cover * Rubber brow rest prevents scratching of eyeglasses * Ophthalmoscope head made from polymid an impact resistant space age thermoplastic * AA metal battery handle interchanges * Zinc nutrient dressing formulation and balanced pH technology