Usually sealed with a heat sealer or stapler (not included in purchase). A HEAVY DUTY roll of polythene layflat tubing, 4" Wide x 168 metres in length, 500 gauge in thickness. The weight of the roll is 4kg. All the polythene layflat tubing we stock is UK manufactured to the highest quality standards. Polythene layflat tubing, also known as plastic clear tubing, is a transparent polythene tubing used for protecting/collating/wrapping various objects. Lay-Flat tubing is made of high quality polymers and offers strength, lubricity, chemical inertness, and biocompatibility.