DSLR Matte Box for 15mm Rail Rod Support follow focus System D90 5D 60D 600D NEWMattBOX Matte Box for 15mm rail rod support system Adjusted the height (up to 50mm) according to the lens of camera Adjustable Barndoor to meet your needs Top and side flags are all easily removable Made of anodized black Metal and plastic ( fits 15mm rail system )