MTM Hydro Magnum28 DS Spec Foam Cannon Kit + BAR Short Trigger Gun (360 swivel) Bundles The unique open cell all new The unique open cell all new foam material removes mild to severe defects from most paint systems easy to use formula hence providing you with excellent results leaving an extreme high gloss polish suitable for that last step of the correction process prior to applying your Sealant The chemical injection knob on top of the PF22 also clicks and allows for precise measurement of more or less chemical to be drawn through the internal chamber fill with your desired ratio of chemical and you are up and running