NOTICE: The pressure chamber seal and washer in this kit will not work on all Daisy 880's. Older models will likely the old style rebuild kit. New rebuild kit for 35/880s/7880/880 Daisy Powerlines. It will not work with most older metal side cover 880's and some plastic receiver 880's that use the old style pressure chamber seal. The easiest way to tell is the Old Style guns have a brass pump tube and the New Style guns have an aluminum pump tube. You can usually distinguish which material your pump tube is made from without dis assembly. This kit works for guns with an Aluminum pump tube only. I have pictures in this listing showing both styles of pressure chamber seals, this kit is the new style. It will work for the guns made in china, they have are marked as such and have an aluminum pump tube. This kit will replace the most common wear parts on the rifle. It includes new O-rings for the pump tube and pump head, new O-ring for the exhaust valve, new foam oil wiper and a new pressure chamber seal assembly. New OEM Daisy parts. I have a complete line of parts for this rifle. Thanks,