2 Air Filters Plus 2 Pre-Filters For Honda Air Filter 17211-Z0A-013, 17211-ZOA-013, Pre-Filter 17211-ZOA-810, 17218-Z0A-810, 17218-Z0A-000. Same As Honda Combo Number 06172-Z0A-305 2 Quality Aftrmarket Air Filters and 2 Pre-Filters. Air Filter Replaces Honda 17211-Z0A-013 Pre-Filter Replaces Honda 17218-Z0A-810 Replaces Honda combo number 06172-Z0A-305 Width: 4-5/8", Length: 8-5/8", Height: 7/8"