One (1) stand fits both t620 and t630 thin clients and includes the screws. The stands have a slightly smaller footprint then the t620 plus stands. I prefer these as they allow the thin clients to stand in a tighter space. If you'd prefer the larger stand, message me before you hit the buy it now and I'll comply.
These are not made for the t520's. If you are looking for those fitting the smaller HP t520's thin clients, contact me. Thanks for your business.