Complete o-ring set for Centerline version of the F2 (does not include offset versions). 1x M1.5 x 10.0 (Buna 70) - Outside of Nozzle 1x M1.0 x 5.5 (Buna 70) - Inside of Nozzle 1x M1.5 x 7.5 (Buna 70) - Inside Front Cylinder 1x M1.0 x 2.5 (Buna 70) - Inside Rear Cylinder 1x M2.0 x 9.0 (Buna 70) - Inside Sleeve 2x M1.0 x 19.0 (Buna 70) - Outside Sleeve 1x 010 (Buna 70) - Front Poppet 1x M1.5 x 6.0 (Buna 70) - Rear Poppet 1x M1.0 x 4.5 (Buna 70) - Barb Fitting