https://www.ebay.com/sch/i.html?_nkw=Allegro+Service+Kit+3+50+X+6+40&_sacat=0&_dmd=2

Allegro Service Kit, 3.50 X 6.40

Regular price
$187.00
Sale price
$126.00

Service Kit, For Use With Allegro 3/4 HP Ambient Air Pumps, Includes Set of 4 Vanes, Filters and Flushing Liquid