TAMLYN PF8-KB PLANK FLASH Moisture Barrier Aluminum Primed Trim 8.25" Pak of 50. Butt joint flashing designed for siding.  Used to reduce moisture penetration behind the joint where two planks butt together and drain water over the top edge of the last full course of siding.  Patent #7721488.  The patented design allows for quick and easy installation. Two boxes available, 50 per box.  Never used. Made in USA.