This is a fundamental building material for use in scratch-building or customizing models.
This is a set of parts to create flexible pipes ("flesh"-colored, no less!). This is the "small" set, featuring sections that measure 3mm long and 3mm wide, with separate ball joints that measure 2mm long (when combined, each pipe section with ball joint installed will measure 5.3mm long). No stats are available on how long they'll be when all joined together, but you get the idea.