100x100mm Resin Standard Neutral Density Pro kit of 3 filters This kit includes the 3 most popular Standard ND filters - 0.6 (2 stops), 0.9 (3 stops) and 1.2 (4 stops). High scratch resistance, low material fatigue, and chamfered corners to resist breakage so the filter will provide years of service The filter kit is also available in 67mm, 85mm, 150mm and 165mm sizes Fits the Formatt-Hitech 100mm holder system, so a single filter is usable on multiple lenses Compatible with Canon, Sony, Nikon, Tokina, Sigma, Zeiss, Panasonic, Tamron, Samyang, Rokinon and other lens brands