Neewer ND Neutral Density Filter Set for Cokin P Series: Full & Graduated Filters (ND2 ND4 ND8 Filter + Graduated G.ND2 G.ND4 G.ND8 Filters)+(9) Adapter Ring+(2) Filter Holder+(1) Lens Hood Compatible with Copkin P series. Kits includes(6)Full & Graduated Filters ( ND2 ND4 ND8 Filter + Graduated G.ND2 G.ND4 G.ND8 Filters )+(9)Adapter Ring (49mm,52mm,55mm,58mm,62mm,67mm,72mm,77mm,82mm)+(2)Filter Holder+(1)Lens Hood +(2)Microfiber Cleaning Cloth+(1)Filter Carring Pouch. ND filters reduce the amount of light reaching the film without affecting the color. Can be used to enable slower shutter speeds. Gradual filter is a MUST for digital users, because the digital sensor unlike film has very low exposure tolerance. Detail will be lost on both low and high light area. To correct this, you need gradual filter to balance it! The filters are made of high quality plastic. The filter carrying pouch has clear inner lining for quick and easy access. The cleaning cloth is safe for all surfaces and lenses.