3M-Matic™ Conveyor Attachment, 18 in, for 200a, 700a, 700r, 800a, 800a3, 800ab, 1/Case  3M-Matic™ Infeed/Exit Conveyor is a conveyor extension attachment designed with ball bearing rollers in a powder coated frame. We constructed this conveyor attachment to bolt easily to the case sealer and offer smooth transition from existing conveyor lines in and out of the case sealer. This extension also provides a packing surface for cases at infeed.