Herga Mushroom Air Button Complete 6433 Series Black 2 Inch PRODUCT FEATURESAir Button, Herga, Mushroom, THD, Black Low cost, rugged bellows with threaded stem and nut Patented no-leak construction Need hole size 13/16" diameter * Bellows Air Button...

Herga Hard Air Button Bellows Only 6470 Series Bellows Housing With Plunger , 4Mm Spout PRODUCT FEATURESMeasures 1 5/16" Allied Innovations part number 3-15-0321 Herga number 6470-ZZAB