For any crazy Dolly curve movement, 15 meter tube to put on the floor. The dolly have one adjustable legs, so no need to be perfectly aligned. There is no need for each track tube to be linked together, so operator can walk in the middle of the tracks. Strong enough to add our crane on the dolly. Dolly legs can be extended to be more stable or reduce to go inside doors. Kit including: – 1 x Dolly with 3 arms and 12 wheels (video Tripod not included) – 1 x flight case for Dolly – 1x 15m flexy tube The tube is heavy and need to be carry with care to not scratch the surface.