The Telescopic Dolly from Libec is designed for use with RT20C / RT30B / RT40RB / RT50B / RT50C tripods and allows you to dolly in any direction. It features a carrying-handle in the center section for easy lifting and transport. The dolly has a sliding range of up to 7.3" and a weight capacity of 99 lb. Each wheel has a foot-activated lock/release pedal, making it easy to lock down and release without having to bend over. When not in use, it folds for easy storage and transport. Its casters are 4" in diameter, and the rubber tripod attachments are adjustable and are also compatible with select Vinten, Manfrotto, and Sachtler tripods.