Louet warping posts - unlacquerd
 
A nifty alternative to a warping board or warping mill.
Two bars of posts clamp easily to a table surface and can be used to produce a surprisingly long warp.
It is possible to achieve a 9 warp with two crosses using these posts. 
Because the posts are designed to clamp to the edge of a table in an L configuration there is no need to lean across the table to warp, a benefit to the back!
When not being used the warping posts can be de-clamped and packed away to save space.