This pack of four MicroWheel Camera Dolly Wheels from RigWheels are simple and versatile tools for constructing your own pipe dolly, skate dolly, and other DIY camera slider. Each MicroWheel carriage mounts to your dolly platform using a single bolt and features four bearing wheels to smoothly ride on any pipe with an outside diameter of 1 to 2". The machined 6061 aluminum wheel carriages and high quality bearings combine to allow each carriage to support loads up to 50 lb. In addition to riding on rails, the MicroWheels can also be used on table tops and other flat surfaces. You can even attach the wheels directly to 15mm rods using optional adapters, allowing you to turn your 15mm rod support rig into a compact and portable camera dolly/slider.