We are counted as one amongst the preeminent Manufacturers and Exporters of Packaging Shrink Films. Center Fold Shrink Films are available in the form of a roll. The Shrink Films are folded in the center so that it comes off the roll with the fold to the top. The actual width of film unfolded is twice what is listed (18" film unfolded is 36" across). These films are used with L-bar sealers of all types and can also be used with I-bar sealers. We have two different types of PVC Heat Shrink Films depending on your application. Polyolefin is usually soft; if you squeeze a piece of it in your hand, it's soft like Saran wrap. PVC, on the other hand, is crinkled like cellophane. Our polyolefin films can be used for any application including foods. The PVC film we carry is not rated for wrapping food products. The higher the gauge, the thicker (and most of the time, stronger) the film. So, use 100 gauge for heavy duty wrapping applications and 60 gauge or thinner can be used for less demanding applications such as tamper proofing soft ware boxes.