Home / Twin Star Cars Products / Twin Star Cars O Scale Products / Twin Star Cars O Scale Detail Parts / PS2 Conversion Bolsters with Coupler Pocket (Brass) PS2 Conversion Bolsters with Coupler Pocket (Brass)$26.00 These parts were designed to convert the Atlas PS2 4427 hoppers. They can be modified to use them on any PS2 hopper. Purchase Information Categories: Twin Star Cars O Scale Detail Parts, Twin Star Cars O Scale Products, Twin Star Cars Products Related products Twin Star Cars O Scale Detail PartsTwin Star Cars O Scale Products Rock Island Heralds Modern Era OModern Era O Decals Rock Island Decals This is an 8 sheet set to decal any rock Island equipment. Covers pretty much all diesel era equipment. Twin Star Cars O Scale Detail PartsTwin Star Cars O Scale Products Spark Arrestors Spark arrestors used on Rock Island GP and F units. Twin Star Cars O Scale ProductsTwin Star Cars Products Rock Island 53′-6″ Flat Car Kit (sold out) The model represents the 46’ Ryan Car Company series 93250 – 93749 which were rebuilt and stretched to 53’-6” between 1941 and 1942. The new cars were renumbered to 90500 – 90798