Koolertron Professional HD DSLR Portable Matte Box With Dual Filter+Rigs Trays for 15mm Rod System For Canon 550D 500D 600D 1100D 60D 50D 40D 5D 5DII 5DIII Swing away & lock-in design matte box, ideal for quick lens changing Three removable flags Two 360 rotatable filter trays and adaptors for polarizing filter Filter trays are switchable for 4"x4" and 4"x5.6" filter size Industry standard height with +/- 10mm adjustment