Specimen Reclosable Bags. Dimensions: 12 inch W x 15 inch L Gauge: 1.75 mil Color: clear Quantity: 1000 pack These clear bags have a zipper seal closure, which has interlocking grooves that press together to provide a secure, leak-resistant closure. Seal top reclosable bags provide outstanding protection, convenience and economy. Zipper bags offer repeated access to contents because of their convenient reclosable zip-type closure. Designed with strong seals against outside dust and moisture, these storage bags are much stronger than traditional low-density polyethylene bags. The clear bags offer superior clarity for showing the quality of products contained. Sample bags are an essential product in many labs, and research facilities. These transport poly bags are used in a number of applications such as water, dairy, veterinary, pharmaceutical, microbiology, environment and more. You can also use them in tattoo parlors and beauty salons if needed. Reclosable seal top bags can be reused.