Dunlop silk 18 gauge string reel the dunlop silk 18 gauge string reel is an ultra premium mutli filament string that delivers unmatched power and comfort for gut like playability and touch feel that is as smooth as silk specification bull construction pure dupont pa66 multi filament central core bull gauge 118mm18 gauge bull profile fibres bonded with thermo elastic pu resin with super bonded polymer outer coating bull length 200m at sportsdirectcom we have a range