Wavin OSMA Squareline Union 100mm White 4T809w

the black rubber seal at either end of the union fits in a slot that goes all the way through the plastic part meaning there is only a small joint of plastic at both top edge's you have to be very careful connecting it as it snaps easily as mine did and now leaks, at some point i will replace the guttering and will not be using Osma.

Looks ok just waiting for the guttering

What's there to say? It's a piece of white guttering that does what guttering does in an aesthetically neutral sort of way.