880 rubber Spring/buffer (Elastomer) for pump rod on Daisy 880, 881, 917, 922, etc. This is the middle soft piece on the pump rod Piston Head. It will come to you twice the size of the one in your gun. You will need a vise or Clamp that opens to about 7 or 8 inches to compress the this part so you can get the roll Pin holes to line up so the Pin can be installed.