This is the 7 rib accessory belt needed to delete A/C and power steering, from your K swap, and yet retain the OEM auto tensioner and idler pulley.
The 1360mm belt works on all K24Z3 engines without any changes. The 1320mm belt is needed for the K24A engines, and customers with early K24A2 engines (hydraulic power steering donor cars) will need to add the Honda EP3 style idler pulley (31190-RRA-A00), bracket (31175-PRA-000), bearing cover (31185-PCX-003), and bolt (90031-PRA-000).