40-O-Ring comes with straight sidebars.
Synthetic rubber O-rings seal in lubricant within the bearing area of the chain.
Ideal for applications where keeping dirt and other contaminants out of the bearing area is critical.
Commonly used where continuous re-lubrication is not possible or difficult.
All O-ring chain has Quad Staked pins to allow greater pin push-out force.
All size available in brands -
Indian :- Diamond
Japanese :- Senqcia / Hitachi