• New in the package Primer Bulb Pump for Walbro Carburetors 
• Fits Select Models of WA, WT, WY, WYJ, WYK, WYL, WYP and WZ Walbro Carburetors.
• 3/4" OD x 9/16" HT  
• Replaces Walbro Numbers 188-12, 188-14, 188-17, 188-12-1, 188-14-1 and 188-17-1, Echo numbers 12318140630 and 12318109560