SHELF LIFE: 1 year.TEMPERATURE REQUIREMENTS: * Shrinks at 200-260 F. * Typical shrink tunnel heat setting: 250-350 F * D-955: At 260F shrinks 77% in each direction. * D-940: At 260F shrinks 82% in length and 75% in width. * Storage temperature: -60 to 90 F.ROLL DIAMETER: 10" (+/- 1/4")CORE: 3"MISCELLANEOUS: * Centerfold: folded in half & wound on the roll. * When unfolded, the width listed is doubled. * Must use heat gun or heat tunnel to effectively shrink film. Hair dryers do not get hot enough. * Acid free.