The Chrosziel 450-R20 MatteBox Kit is designed for use with JVC GY-HM700/710/750 and 790 cameras using a Canon KT14X4.4 zoom lens. The Kit consists of a 450-R20 two stage matte box with one 4 x 5.65 front stage and one 4 x 4 rear stage rotating filter holders. It also comes with a 401-63 LWS base with 8.07" (205mm) long and 0.59" (15mm) diameter rods, 411-72 4.33" (110mm): 2.83" (72mm) screw in lens adapter ring and a top flag. The 450-R20 matte box prevents stray light from entering the lens. It also allows you to add filters for color correction and special effects to get a more professional result.