Safe solar observation with all types of binoculars / safe solar photography with all camera lenses | AstroSolar Safety Film OD 5.0, mounted stress free in high-clarity cell | One side of filter cell shortened for use with binoculars. Two filters are mandatory for binocular observation, mentioned price is for one piece only | Comes with three centring bolts of 13mm diameter and 24 mm height, adjustable to the tube diameter of your binocular. In addition three safety straps and mounting instructions | Baader Planetarium Astro Solar 50mm Binocular