Designed for use with the B10, B10 Plus, and B1X, this amber Profoto OCF II Half CTO Gel Filter mounts magnetically to the OCF II Grid and Gel Holder or the OCF II Barndoor. The filter warms daylight 5500K to about 3800K tungsten balance for a late afternoon effect or for use as a hair or accent light. The filter easily stacks with optional grids for selective lighting.