No you buy the straw kit, you then cut the end of the nipple off there's a line to cut it to them you feed the tube down the hole in the nipple which has a bung on the end that squashes in and seals when you clip on the external Union /pipe bit.
Piece of cake have you done it yet?
56 350 2.2 130ps mk7 with 2 side doors
65 290 2.2 125ps custom with 2 side doors
07 350 170ps
Ids v86 licence + v86.04 update + xprog
hereIds map
here