The Stacked stem is the tallest stem in BSD's range, at 33mm tall it will stack your bars up! CNC machined from 6061-T6 this stem grips like a vice, especially the newer 1" OS version which has the most clamping power due to the bigger clamping area.
 
Specifications
Rise - 33mm
Reach - 50mm
Clamp Size - regular 7/8" or 1" OS
Weight - 312g