Description: Replace part number: IM5100, IM5100-20A, IM5100-22A Kit Includes: IM5100-20A Trigger Valve × 1, ME1A226 Spring × 1, IM5100 O Ring × 2, IM5100-22A Value Seat × 2 Compatibility: IM5100 Trigger Valve Kit Compatible with PH2045, PH2050, PH50F Air Hammers, FAR720, FAR750, FAR7200 Pneumatic Ratchets and IM5100 Impact Wrenches, and Model 4035 1/2-Inch Driving Tool Please note: 1. This is an aftermarket part, not an OEM one. Please make sure it will fit your machine before placing order(s). 2. If you are not sure whether the part will fit your machine or not, please message us and let us know your engine model, machine model, we will help. More information, more helpful. 3. If buyer orders wrong item, buyer will be responsible for return and exchange postage.