Ply Gem 1-1/2 in. White Vinyl Finish Trim
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Ply Gem Vinyl Finish Trim, also known as undersill trim, is used to hold the top row of siding in place, near the roof line or under windows. It is a necessary accessory for any siding job. Ply Gem accessories are designed to withstand the toughest weather and retain their beauty and color, year after year.