OEM Primer Bulb / Walbro 188-12-1Pack Size:1Poulan 530-035497, Walbro 188-16-1, Walbro 188-16, Walbro 188-12, Walbro 188-12-1NHC 203-5466Walbro WA-224-1, WA-226-1, WA-228-1, WA-229-1, WA-230-1 and WA-232-1; WT-501-1, WT-519-1, WT-557-1, WT-558-1, WT-586-1, WT-587-1, WT-592-1, WT-606-1, WT-626-1, WT-630-1, WT-631-1, WT-632-1 and WT-638-1 carburetors on Poulan equipmentOD: 13/16 ", Height: 5/8 ", Ethanol: Compatible with greater than 10% ethanol fuel