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New Primer Bulb for Homelite / Walbro Walbro Part #'s: 188-12-1, 188-12 & 188-14-1 Fits WA, WT, WY, WYJ, WTK, WYL, WYP & WZ model Walbro carburetors with primer bulbs of the following dimensions: This Walbro primer bulb is the same as the following OEM manufacturer part numbers, plus others: 12318140630 & 12318109560 (Echo) 01201 & UP04802 (Homelite) 22583400 (McCulloch) 2003681670 (Shindaiwa) 4133 121 2700 (Stihl) These are other part numbers for the exact part but this is a WALBRO part! Size: Bulb height: 0. 55"(14mm) Bulb flange diameter: 0.75"(19mm) Bulb diameter: 0.625"(16mm) This is non original aftermarket parts, you will receive exactly showed on the picture, please check the pictures for compatibility before ordering it, we have the great confidence with the quality of our parts and provide 3months warranty too.