This Front-Loading Supreme Stem is Very Light and Strong, made from 6061-T6 Aluminium and Fully CNC Machined to Reduce Weight.  It has an Offset Rear for Improved Clamping (it also looks cool!), weighs only 293g and comes with a removable Gyro Plate (17g).
 

• Front-Loading Supreme Stem
• 100% CNC Machined from 6061-T6 Aluminium
• Offset Rear for Improved Clamping
• Comes with Gyro Plate
• Weight: 293g (Stem) + 17g (Gyro Plate)