You will need 12 pcs 5x3 mm cylindrical magnets to assemble the frame: - push 4 magnets to the holes at the corner of the frame - cover the frame with the diffuser material - put 4 magnets to the corners to fix the diffuser on the frame - remove the plastic cover pieces from the corners of the YN-300III led light which hides the screws - push in 4 magnets to the holes on the light's frame I cut out a piece from a shower curtain as diffuser material.