10 Pack of Savior Carburetor Carb Replace Primer Bulb Pump Bulbs for Poulan Homelite Echo Stihl Shindaiwa McCulloch OD 0.75" ID 0.55" 10pcs High quality primer bulbs Fit most 2 stroke and 4 stroke chainsaw trimmer brushcutter blower carburetors Primer bulb size: OD 0.75" x ID 0.55" x H 0.55"