The E-Image ES220 is an extendable slider from E-Image. The ES220 comes in a set of parts: an 80cm slider with a handwheel, drive-belt, and legs, extension pieces with extra sets of legs, and a longer drive belt to accommodate the expanded travel distance of either 150cm or 220cm.
To change the slider length, remove the shorter drive belt and unhook the end piece. Attach the extension, then re-attach the end piece to the extension. Next, thread the longer drive belt through from the carriage, through the end pieces, and back around to the carriage. Tighten the belt, and the slider is now nearly twice as long as before!
The ES220 can mount to 1/4-20 and 3/8-16 screws on the center cheese plate when in 80cm mode, and can mount to 1/4-20 and 3/8-16 screws or to a 5/8" baby pin stand mount on the end pieces in any configuration. The carriage has a 3/8-16 screw for mounting large cameras or fluid video tripod heads with a flat base.
The end-piece is compatible with both the handwheel (included) or the E-Image Motor1 (not included).