Polished aluminum and brass combination. Fits 1" diameter handlebars. Both left and right grip comes with 1" internal diameter for use on bikes with a custom internal throttle set-up. At Kustom Tech style is King. It clearly shows in these handlebar grip sets in which each grip consists of two separate parts; smooth for the inner and ribbed for the outer piece; for an ultra cool Kustom look. Note: Great to style match with Kustom Tech hand controls. Note: Optional ribbed grip ends; with different finishes; are separately available to make grip sets in various combination finishes. For optional ribbed grip ends see: 914956 Polished brass. 914957 Satin brass. 914958 Chrome aluminum. 914959 Polished aluminum. 914960 Satin aluminum. 914961 Black anodized aluminum. 914962 Black anodized contrast cut. Note: Compatible with Kustom Tech internal throttle systems 532031 (regular right side throttle action) and 532117 (left side throttle action).