Original OEM Product For models HC363, HC822, HC920, HC921, HC4031, HC4050, HC5010, HC5015, HC5020, HC5030, HC8017, HC5850, HC5855, HC5870, HC5880, HC5888, HC6550 Made of heavy gauge plastic which is less likely to break Will not fit older versions with 'slide-on' combs For models HC363, HC822, HC920, HC921, HC4031, HC4050, HC5010, HC5015, HC5020, HC5030, HC8017, HC5850, HC5855, HC5870, HC5880, HC5888, HC6550 Made of heavy gauge plastic which is less likely to break Will not fit older versions with 'slide-on' combs