Sof Rol® White Rayon Undercast Cast Padding, 6 Inch x 4 Yard, 1 Case of 36 Canes Specialty Bugstop Seal Tape Closure * Undercast Padding Bugstop Seal Tape Closure * Waterproof top and sides (to zipper) * 100% Stretch polyester knit sides below zipper and on bottom * Stretch to fit mattresses up to 15 deep * Dust allergen proof and fire retardant * Self locking rust proof polyester zippers * Case of 6 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 * 100% surgical grade rayon making it particularly suitable for use around wounds