Dirt Devil Room Mate Vacuum Cleaner Style 7 Flat Belts 2 Pk Part # 3400615001 Dirt Devil & Royal Model-08400 Roommate Upright Vacuum Cleaner Style 7 Flat Belts 2 Pk { 2 Belts Only } its With MOdels : M084015, MCE7000, MCE7000B, MCE7000W, MCE7100, MCE7100B, MCE7100B, MCE7100C, MCE7100CBP, MCE7100CBP, MCE7100HSC, MCE7100HSC, MCE7100HSN, MCE7100HSN, MCE7100W, MCE7100W, MCE7150, MCE7150B, MCE7150HSN, RCE7100, MCE6105, MCE7300, MCE7350, MCE7450, FD50035. Genuine Part # 3400615001. Replace your belts every 3 to 6 months.