The Sanitaire 618642 dirt cup is the OEM replacement for the FORCE Bagless upright vacuums SC5745B and SC5845B. The smokey clear housing allows visual monitoring of the fill level without stopping to check. At 4.5 dry quarts, it holds enough debris for extended commercial cleaning sessions. Replace when the cup is cracked or the seal is compromised. Fits Sanitaire FORCE SC5745B and SC5845B.