Pinit Shrink Bags 4 x 6". 75 gauge acid-free Polyolefin. Use for Audio Cassette Cases. SKU: BSW46 (0)No Reviews yet Add to Shopping Cart Details Polyolefin Shrink Bags 4 x 6" Use for Audio Cassette Cases. Made from 75 gauge high-clarity archival Polyolefin. Come with a small vent hole to pre... Details Back DetailsPolyolefin Shrink Bags 4 x 6" Use for Audio Cassette Cases. Made from 75 gauge high-clarity archival Polyolefin. Come with a small vent hole to prevent ballooning when shrinking bag around product. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review