Cnau hecs dur carbon dur di-staen, cnau hecs pres M1.7 M2 M2.5 M4 M5 M6 10 M12 M20, cnau hecs pres, cnau hecs galfanedig, cnau hecs allanol, cnau hecs wedi'i stampio, cnau hecs mewnol, cnau hecs dur di-staen, neilon cnau hecs, cnau hecs dur carbon, cnau hecs M4, cnau hecs pres H59.