67B50B100PM12 SSF67B50B150PM12 SSF67B50B200PM12 SSF67B50B250PM12 Upper Level 25mm 25mm 25mm 25mm 25mm 25mm 25mm 25mm 50mm 50mm 50mm 50mm 50mm 50mm 50mm 50mm Lower Level 75mm 100mm 125mm 150mm 175mm 200mm 250mm 300mm 100mm 150mm 200mm 250mm 100mm 150mm 200mm 250mm Total Length 102mm 127mm 152mm 17.