I
if you have a 110 they are exactly the same as the earlier series 109 ones so you can get a set of those and swap them over which is what I did one mine. One of my friends went so far as buying a complete series tub (second hand) to use the cappings off and then sold the tub on without the cappings. Got The whole tub for less than the price of a single new capping and when resold made the whole wxcersise nearly free!