Konova Slider K5 120 (47.2 inch) Track Aluminum solid rail roller bearing for smooth slide for Camera, Gopro, Mobile Phone, DSLR, Payloads up to 55bs (25kg) with Bag Supports various accessories for parallax shot, motorized system and flywheel. Thicker rail and 3 big bearings support heavier payload for big camera system. Multiple 1/4" and 3/8" screw holes on both ends and middle for various mounting options. Two chrome coated shafts in the rail for rust protection and make slider more smooth with 3 big roller bearings. Removable and foldable legs allow the slider to be put in an included carrier for portability.