OVERSEE 64E-43820-00 Trim Piston Sub Assy With Screw 

For Yamaha Outboard Motor 64E-43820-09-00 64E-43821-00

For Yamaha Trim Piston Sub Assembly 64E-43820-02 And 64E-43821-00 

With the full set oil seals on it.

Yamaha part number: 64E-43820-00-00

Material: Stainless Steel 304

Included : 6E5-43864-00  O-ring-----------x1

                6E5-43874-01  Ring, Back Up--------x1