Replacement vaccum tube-a for the UMS 5-210cc, the five-cylinder 210cc four-stroke radial from UMS.
Function: it is vacuum tube type A for the induction plumbing.
The reason this ends up on an order: a consumable tube renewed when perished, which is the usual reason for an air leak on an older radial. Supplied as a pack of 5, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Cut to length squarely so the end seals on the nipple.
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