MIJ Customized Speed Knobs for Metric Guitars -Gold- Brand New Made-In-JapanCustomized Speed Knobs for Metric Replacement control knobs There are "Wave Embossed" for better grip. These knobs are for metric size POT (for ex. Japanese,Chinese,Korean ).If your guitar's POT is inch size (for ex. CTS), please choose same one for inch. Shipping Time: in general, up to 2 weeks.