K&M SP 01-91-050-55

The K&M SP 01-91-050-55 is the sort of object that the universe tends to produce when it has run out of ideas but still wants to keep hardware stores in business. Nobody has ever woken up thinking, “Today I shall finally acquire a SP 01-91-050-55.” And yet here we are.
It is, technically speaking, a spare part of such staggering adequacy that it accomplishes precisely what it is supposed to, and not a single thing more. Which is a relief. If it suddenly made tea or recited poetry in the style of Vogon verse, one would be quite alarmed.
At a price so low that even the most miserly accountant would nod approvingly, it provides not only functional satisfaction but also that most elusive of consumer joys: the excuse to buy several other items in order to justify the shipping costs. In this way, the SP 01-91-050-55 is less a product and more a cosmic catalyst for retail expansion.
Would I buy it again? Without hesitation. Much like the towel, the SP 01-91-050-55 is the sort of thing you don’t realise you need until you suddenly can’t live without it—though admittedly with considerably fewer uses in space travel