Marpac Uniflow Primer Bulb 3/8" Barbs Marpac Uniflow Primer Bulb 3/8" Barbs $21.09 SKU: MARPB10100 In Stock Only 1 left! Quantity -+California Proposition 65 Warning Add to Cart Details Uniflow Primer Bulb helps to increase fuel flow rate and maximizes engine performance. 3/8" BarbsMeets EPA low permeation ... DetailsBackDetailsUniflow Primer Bulb helps to increase fuel flow rate and maximizes engine performance. 3/8" BarbsMeets EPA low permeation mandatesLong life and dependableEthanol resistant, use with ethanol enriched fuelsPrevents back flow with built-in check valveSee MoreSee Less Reviews Back Ratings & ReviewsNo reviews availableBe the first to Write a Review