Nanlite Barndoor w/ Eggcrate Grid for Pavotube 30CThe Nanlite Fabric Barndoors and Grid for PavoTube 30C LED Tubes mounts via T12 diameter clips to minimize light spill and add directionality. Control Light Spill Equip your PavoTube 30C LED Tube with the adjustable fabric bar doors and modify it's beam angle from 180 down to less than 5 Add Directionality Add the included 45 Fabric Grid to selectively light subjects without losing the PavoTube's diffuse light quality. Standard T12 Diameter Mount