Windscreen wiper end-cap

An internal tongue 10 of an end-cap 5 locates as a snap-fit into an opening 11 cut into the top of a vertebra 1, so that the end-cap 5 does not slide off. The top wall 12 of the end-cap 5 is partially cut away by slots 13 and 14. This top wall portion 12 is then held only adjacent to the other side wall 7 and can flex upwardly so that the top wall portion 12 can be prised upwardly to release the tongue 10 from the recess 11, to enable the end-cap 5 to be removed.