It only makes sense if you're buying just the rods, as they have to package them in something, right? What's really infuriating is when you order them along with a plane, only to discover that they've been tossed inside the plane box but you were still charged the extra postage for a separate box that doesn't exist. Thanks a bunch HK!!
I'm not sure why you would want to use a sleeve for these, as they're stiff enough to be used w/o sleeves in lengths up to 300mm-350mm and too stiff to be routed in a curved path. The thin steel push rods are good for curved (i.e. inside fuselage) paths, but need to be sleeved with the sleeves spot glued to keep them from bowing under compression. Cheers!
part of existing stock of materials for scratch build projects. again, multipurpose usage, flexible, strong but needs to be stored and transported appropriately, as potential damage could possibly occur.
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This is really good for replacing heli tail rod arm. straight and strong. Fits wery well inside 3x2 hollow CF tube.