Deunydd: dur rholio oer
Diamedr Crwn: 12mm i 100mm
Diamedr sgwâr a phetryal: 12x12mm i 100x100mm; 8x16mm i 50x100mm
Trwch: 0.8mm i 2.2mm
Cais: pibell ddur dodrefn a phibell ddur strwythur arall.
Diamedr Crwn: 12mm i 100mm
Diamedr sgwâr a phetryal: 12x12mm i 100x100mm; 8x16mm i 50x100mm
Trwch: 0.8mm i 2.2mm
Cais: pibell ddur dodrefn a phibell ddur strwythur arall.
