Up for auction is a Hakko valve plate (part number 481-213) used on 700, 700C, 706, 707 and 483 model desoldering stations. If you have any one of these desoldering stations and the vacuum is weak or non-existent, it's highly possible that you need to replace this part or the diaphram (I have those in a separate BIN listing). NEW and unused. This is an extremely difficult part to find. I have 35pcs available. Each bid is for ONE PIECE.