The AXD is Comet's axial plunger pump line for direct engine or electric motor coupling, built with a forged brass manifold, abrasion-proof ceramic plungers, and a built-in Uniflow unloader with chemical injector as standard. Running at 3400 RPM with a hollow shaft flange, it's rated up to around 3000 PSI depending on model and is a common OEM and replacement pump on light-to-mid duty pressure washers.