On the right is the piston and piston bore for our #SILCA Elettrico's. We went with full CNC'ed parts and 5mm larger (maxing out ever mm of internal space), this might sound like a small adjustment, but with it we are able to push just about 75% more air per stroke than stock electric inflators. Giving you faster inflation times. The higher quality materials and construction ensures less air loss per stroke as well.