Liners have a firm, smooth, matte-white, resilient surface. Constructed of cross-linked polyethylene closed-cell foam that is 1/8” thick. Sensitive instruments are cushioned, and glass breakage is reduced. For protection against vibration, chemicals, breakage, heat or dirt, these liners are perfect! May be cut to any size. Takes tacks, tape, and staples. In 50 foot rolls.