Check the listing for details. 231HP TK1 AND 231XP TK1 INGERSOLL RAND CUSTOM TUNE UP KIT FOR 231G, 231XP, 231HA. Condition: New other (see details). Listed at 34.99 USD. This ebay Buy-It-Now offering provides a custom designed 231HP TK1 tune up kit OR a 231XP TK1 tune up kit for the INGERSOLL RAND 1/2" drive impact wrench model 231G, 231XP, 231HP and 231 HA series. This is 1 kit that fits all the above mentioned applications. This is a combi kit that fits several Ingersoll Rand tools. Buy with confidence for perfect fitment and performance. 8/11/21 Update. Several things have been brought to my attention about Ingersoll Rand 231 models and 232 Thunderguns. 1. The notched rotor vanes that I provide with my IR tune up kits will perform better on tool startup when the notches are all facing FORWARD AND TOWARD the hammer frame. 2. The sealed bearings I supply which come with metal or rubber seals can be easily removed with a small screwdriver. They do not need lubricant as a maintenance item. Contrary to that, Ingersoll Rand provides grease fittings on many of their pneumatic tools for greasing of the rear bearing through the hollow rotor shaft and then forward into the hammer case. The grease is intended to lube the hammer frame components. I have never encouraged the external greasing of sealed impact wrenches even though this is by IR design to be done...regularly. If you are injecting grease by hand pump or with pneumatic assistance you have no idea how much grease you are putting into your tool. Too much grease will pack the hammer frame and cause the tool to perform poorly much the same way that overfilling your engine crankcase with oil cause engine damage. Undergreasing is not likely to happen in my experience nor is tool damage likely to occur from not greasing it regularly. Now, if you take the hammer case off annually and do some hand greasing of the hammer frame parts while inspecting for wear and damage this offers a better alternative to blindly greasing a sealed tool. 3. On ultimate tool performance testing the removal of the seals on bearings can very slightly improve the tool performance. 4. My personal recommendation is to use sealed bearings. Forget about doing periodic greasing but attend to the bearings when you tune up your tool every 3 to 5 years. Avoid over greasing the bearings. They don't need it. The shipping weight is 4 ounces with an eBay USPS.com Ground Advantage shipping label and tracking. Ground Advantage is the cheapest and slowest shipping service offered on eBay. International buyers have this item shipped to Glendale Heights, Illinois for additional processing costs through the eBay Global Shipping Program.