AAI PN SS12301

Replacement 1-1/8" Rubber Piston Cup (FAA - PMA)  for Alpha Aviation STC SA01247CH (MLG Oleo Restoration Kit) - Serial #813 & up.

Also an applicable replacement piston cup for Ercoupe Models Serial #112 to 812.

PLEASE NOTE: Use only automotive type DOT-3 brake fluid when servicing struts using cup seal SS1230.  Do NOT use MIL 56061 (Red) Hydraulic Fluid - it will destroy the rubber cup.