WD Music KB130 Bell Knob Set Top 1 Volume， 1 Tone - Black/Silver<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> 1 volume knob </span></li><li><span class="a-list-item"> 1 tone knob </span></li><li><span class="a-list-item"> 0-10 printed on knobs </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41E2s-m9VcL.jpg" noproxy>