Carbon Fibre ballast tubes - carefully hand-crafted. Lovely, shiny and über-strong.

Devilishly dusky, the buffed and beautiful porn stars of the ballast tube world ........ and in that world where size is everything, these amply proportioned and accommodating babies are:

400mm long
Outside diameter approx. 22mm
Inside diameter approx. 20mm

Just nice to have on the desk for an occasional contemplative fondle - even better shepherding the slugs of church roof in your new, sleek flying machine.

And maybe, if it's more capacious, just give us the nod ..... ;-) ..... we can sort you out with twins.