odel: SL-M310 with original stainless steel variable speed inside      
Level: ALTUS      
Speed: 3 Speed ，8Speed ，3X8 Speed      
Weight: about 265g / pair      
Caliber: 22.2mm      
All dimensions are measured manually with deviation (ranged)at 1-3CM.      

Left 3 speed, Right 8 speed, Rear shifter for 8-speed (rear) cassette setup      
Configuration: Trigger, Indexed speed indicator      
Easy to read optical displays, RapidFire dedicated up and down shift levers      
Compatible with most mountain/hybrid bikes with flat handlebars      
NOTE: this is just shift lever, do not fit with the brake lever