That's if you can actually get anything out of them! I placed an order on 7th March which is still on hold, was told it might take up to 3 weeks for delivery and in order to help them clear the backlog, I could only order maximum 2 sensors at a time. I was then given a free postage code to use from 1st April onwards, presumably because as I can only order half as many sensors as I normally do, I will have to order them twice as often (how exactly does that help them clear the backlog?! Basically they just can't make them fast enough at the moment)