DID's D series chain is a reduced friction, high quality drive chain featuring solid bushed rollers for reduced side play and increased strength, featuring shot peened parts and manufactured using a special alloy steel. 
RJ clip type connecting link. 
A non o-ring chain with superior attributes in wear resistance combined for low weight. 
Used by many factory teams in the motocross world.

D.I.D. is the #1 chain manufacturer in the world.
Solid rollers.
Shot-peened parts.
High cylindrical and roundness accuracy.
Exacting tolerances provide low friction.
Pre-stretched.
Extended riveted bushing "Anti-Kink" design.
Special alloy steel.

Long 134 length so can by split down to the required length