Check the listing for details. Black 45x23 Heat Shrink Neck Wrap Band Liquid Bottle Tamper Seal [250 Pack]. Condition: New. Listed at 12.32 USD. Shrink bands provide a professional look to your products while simultaneously offering a tamper evident safety seal. Not only is a tamper evident seal required in most cases, but it also gives your customers confidence that your product is safe for use. Layflat dimensions: 45 mm x 23 mm (1.77 in x .9 in) Works best for lids with a diameter between 3/4" - 1" 2 Mil Perforated Black PVC Plastic Examples of products this works best with: Many different boston round bottles, tinctures, and various other liquid bottles. As there are many different types and sizes of containers, it is best to measure your specific diameter to ensure you purchase the correct size! Directions: Place shrink band around the lid of the bottle that you will be shrinking it to. Apply heat with the use of a heat gun or heat tunnel. I don't recommend using a blow dryer; it's possible but not worth it unless you're only doing a small quantity of bottles. The shrink bands are easy to heat and durable. Have any questions at all about the shrink bands? Just send me a message and I'll get back to you as soon as I can! Bottles in the image are not included. This listing is for only the shrink bands. Shipping is FREE