M123_M127 Headset Head Cup Installation

#M123   
. Product Dimensions : 5.1 x 5.1 x 6.2cm
․ Weight : 0.325kg
․ Color : Black 
․ Material : Cr-Mo Steel

#M127      
․ Product Dimensions : 5.6 x 5.6 x 6.2cm
․ Weight : 0.398kg
․ Color : Black 
․ Material : Cr-Mo Steel