Zip Box Double 4x5.65 holds two 4x.5.64" (100x114mm) filters and clamps on the the front of the lens. Available in four sizes, 80-85mm, 90-95mm, 100-105mm, and 110-115mm. The lens shade design allows for even the widest lenses and sensor sizes to covered without vignetting. The Zip Box is extremely lightweight and weighs about the same as a standard filter which makes it perfect for gimbal and drone use. Stainless steel components and unibody rubber design are very durable and stand up to the toughest conditions.