Ryobi RY08510 Blower RY30023 Trimmer Replacement (2 Pack) Filter Element # 5687301-2pk by Homelite Genuine OEM Replacement Parts (2 Pack) The purpose of the filter is to keep dust and debris from contaminating the carburetor and engine. Compatible With Ryobi/Homelite/Toro Brand Lawn and Garden Equipment New in Bulk Packaging Please refer to list below for Compatibility.