Description The Athabasca 400 filter kit features an extensive optical enhanced glass. Water repellent, Stain resistant, Scratch resistant with a double sided anti reflective film giving you a low reflection and light reducing layer. The glass features a 1.1mm thickness and the weight of the glass is 39g for GND filters and 26g for ND filters. Features: – Filter Holder 113x107x14.3mm – Adapter Ring 95×2.3mm (67mm, 72mm, 77mm, 82mm) – HD CPL of A3 91.5×3.5mm – Blade ND64 6 stop Neutral Density filter – Blade RGND8 Reverse Graduated Neutral Density Filter – Blade GND8 Graduated Neutral Density filter – Athabasca filter pouch