EXCHANGE REQUIRED. COMPLETE seal kit There are several different versions of the Crosman 400. We have made this kit to cover 99% of all model 400s and Sears version of the 400.. For some versions there will be some extra parts. If you prefer you can always order the individual parts separately on our website for your particular gun using the part numbers below. However, on a very small percentage of the guns the valve stem used was a 160 valve stem. You will have to check what is in your gun, there is no way to tell from the outside of your gun which valve stem your gun uses. It includes CRS130-033, CRS150-028, CRS150-054 (2), CRS150-054U, CRS150-060, CRS1930-012. CRS400-029. Your exchange part is CRS150-060. EXCHANGE INSTRUCTIONS: YOU MUST HAVE AN EXCHANGE TO PURCHASE THIS PART AND IT MUST BE IDENTICAL TO PICTURE OR DESCRIPTION. WE CANNOT SHIP YOUR ORDER UNTIL WE RECEIVE YOUR PART. PLACE YOUR ORDER, SEND YOUR UNDAMAGED PART VIA USPS ONLY, USING A PADDED ENVELOPE, TO JGAIRGUNS P.O. BOX 830, MUNDELEIN, IL 60060. INCLUDE ENOUGH POSTAGE. DO NOT INCLUDE ANY EXTRA PARTS, THEY WON’T BE RETURNED. DO NOT REQUIRE A SIGNATURE, IT WILL BE REFUSED. DO NOT SEND US TRACKING INFORMATION. IF YOU WANT TO KNOW WHEN IT ARRIVES, USE YOUR TRACKING INFORMATION BECAUSE YOU WILL NOT BE NOTIFIED. IF YOU ARE WORRIED ABOUT LOSS, PURCHASE INSURANCE, WE ARE NOT RESPONSIBLE.