10 X Gas Primer Bulbs Pump Screws assembly Fit For McCULLOCH PRIMER BULB Pump Fit For 3200 MAC 17 19 22 2816 328 28 282 3227 327B 32BC 2817 Bin number 188-512 Height:31.4mm / 1.236inch; Wide:21.4mm / 0.842inch Refer to part numbers 530047721 Installation: Easy installation, No Installation Instruction Package include: 10 X Primer Bulbs Pump