IS A PRIMARY AIR FILTER FOR AF26350 OptiAir 400 Series Secondary Element
USES HOUSING AH19474 OptiAir 400 Series Air Housing Systems. 4 plastic, w/o secondary, straight.
USES HOUSING AH19484 OptiAir 400 Series with Twist Lock, 90 Degree Elbow, Primary and Safety.
USES HOUSING AH19485 OptiAir 400 Series Air Housing Systems. 4 plastic, w/o safety, 90 elbow.
USES HOUSING AH19496 OptiAir 400 Series with Twist Lock, Straight Outlet, Primary and Safety.
