For your consideration is this awesome pair of 2012 Ibanez RG471AH cosmo black knurled dome snap-on knobs. These knobs are in great pre-owned condition; one of the knobs shows a bit more wear than the other and such the color is somewhat more silver in appearance. These knobs are 18.25 mm in diameter and 18.17 mm in height from base to crown. They will work with a wide array of guitar models and will fit most any industry spec 6 mm pot shaft. Buy It Now and buy with confidence. Please feel free to ask any questions you may have. Thank you for looking at my listing. FAST & FREE SHIPPING!!!