DIMENSIONS: * White Block: 4 x 4" (w x l)
MISCELLANEOUS: * White block on one side of bag.
ARCHIVAL QUALITY: Acid free and archival safe.MATERIAL: 100% virgin low-density Polyethylene.TEMPERATURE RANGE: 20-150 FSPECIFICATIONS & APPROVALS: * Meets ASTM D3951MISCELLANEOUS: * Recyclable. * Sulfur free. * Silicon free. * Latex free. * BHT free (Butylated hydroxy toluene)