Made out of RTV silicone with a rubber backed canvas. Comes in three different sizes:

Type "A" (1/16 of an inch glue width)

Type "B" (1/8 of an inch glue width (shown in picture))

Type "C" (5/16 of an inch glue width).

Each strip pad has approximately 12 strips 12 inches long. Standard thickness is .250, but can be made to any thickness. Attaches to the cylinder with double faced tape and can be cut and formed to any shape window opening.