We sell per pair of corrugated polyethylene foam roof closure strips (also called foam profile fillers or eaves fillers).Product OverviewMaterial: Closed-cell polyethylene (PE) or EVA foamDesign: Pre-cut with a custom wavy profile to match corrugated or ribbed metal/plastic roofing sheetsPurpose: Used along eaves, ridges, and valleys to block water, dust, drafts, insects, and birds while helping with acoustic and thermal insulation