Acrylic Flame Polishing Kit Introducing the Model PR3HFK Hydrogen/Oxygen Flame Polishing Kit with everything you need to get started. The Kit includes the PR3H torch, PRRB0 and PRRB22 polishing tips, the PR2500350 hydrogen regulator, the PR2500540 oxygen regulator, the PRFA30P flash back arrestors and the PRCT123AB hose kit. The PR3HFK kit will reduce the time and cost of polishing acrylic after machining operations. The Model PR3H hydrogen and oxygen torch can also be used with a variety of additional tips to polish edges up to 6 in. wide or through holes. The hydrogen and oxygen flame will not introduce contaminants or discoloration into the material being polished.