SmallRig Filter Frame (4 x 4") 3648, accessory for Star-Trail and Revo-Arcane series matte box, is designed to balance exposure under complex light environment by allowing installing multiple slide-in filters. The quick-release filter fray features aluminum alloy frame and anti-fingerprint design. It has anti-off safety lock to secure filter and works with matte box or filter system to give the greatest quick release convenience to users of Star-Trail and Revo-Arcane series matte box. 1 x Filter Frame (4 x 4")Product Dimensions: 154 x 134 x 6.3 mmPackage Dimensions: 202×144×41 mmProduct Weight: 78g±5gPackage Weight: 165g±5gMaterial(s): Aluminum Alloy