All Balls Chain Roller 79-5015 Type_Heavy Duty Chain The spark jumps from the

The spark jumps from the middle electrode to the ring-shaped ground electrode

Slim skeleton profile

Outside Width: 5

Bird caged wire ends

Compatible with 4 valves per cylinder heads

All Balls Chain Roller 79-5015 Type_Heavy Duty Chain The spark jumps from theQuality chain roller kit from All Balls Racing. High performance rollers for replacement of OE chain rollers. Features: Universal 34mm and 38mm polyurethane chain rollers have a 98A Durometer hardness for long life. Sealed precision bearings with two additional outer seals to prevent water and dirt from contaminating the bearings. Mounts to frame boss are made from hi performance self lubricating nylon.