Pro-Team TIRELIEF? KitRelieves tire pressure buildup as you race automatically. Use with quick change adapters or mount directly in your wheels by drilling a 1/8" NPT thread hole. 3-38 psi range 100 mesh inlet filter to keep dirt inside tire from plugging TIRELIEF? Light weight aluminumonly 9 gramswon't affect wheel balance Pro-Team TIRELIEF? Kit Preset your TIRELIEFS? BEFORE you install them in the wheels.The setting tool uses your compressed air supply to accurately simulate tire pressure to set valves precisely. Kit includes: 6 TIRELIEF? valves 12 wheel adapters 1 setting tool 1 inflation adapter Carrying case NOTE: TIRELIEFS? are designed ONLY to relieve normal tire pressure buildup ON THE TRACK. They should not be used as a safety device.Pit Stop USA offers Longacre Pro-Team Tirelief™ Kit w/ Setting Tool 50100 at low everyday prices. Be sure to check out all of our products from Longacre Racing Products including Longacre Racing Products Tireleafs and Longacre Racing Products Longacre TIRELIEFS.