Model No.: 11004 Name: Wave Gravity Indicator Color: Matt Black Cover, Silver indicator. Materials: Aluminum / Bakelite Feature: Good looking and accurate indicating and durability, mechanical structure. Clockwise or counterclockwise rotation to increase for choice. Specification: Axle hole diameter plus outlook Diameter and ratio and direction/ rotation for choice as below: 1) 10d *85 D with 5 ~100 ratio and I or E ; 2) 12d *125 D with 5 ~100 ratio and I or E ; *** Customized size, pls contact with us for discuss. More information, pls feel free to view our webiste: http://www.zgdingye.com, or contact with us by email: dy-ft@zgdingye.com.