The Dana Dolly Portable Dolly System Rental Kit is an indispensable choice for every professional cinematographer. It features 16 custom dolly-track wheels, which are made from soft polyurethane, support a camera payload of up to 100 lbs, and use ABEC-7-rated precision bearings for smooth movements. Use the included 75 mm, 100 mm, and 150 mm bowl adapters for a variety of shooting scenarios. The wheel trucks can swivel on the dolly, thus facilitating smooth rides on round and straight tracks. The included Mitchell mount is equipped with an elongated key way, which lets you use non-standard adapters. For storage purposes, a flight case comes with this package.