... -First digit(Headband Material): 1:UV treated Vinyl Headband; 2:1.5mm Nylon Headband 3: ... -e.g. TN1261, Low Platinum Tennis Net, Vinyl Headband, 2.6mm Netting body, Single layer; TN3353 ... Nylon threads, SGS Tested breaking strength.-Baterial Treated Vinyl, 18oz (0.55mm), UV Treated, 2 Years ... fit the internal/external winder)Quality Control:-Clean Flooring making Tennis net clear during ship to customer ...