3M CIR-3/0 Connector , 3/0 stranded, O.D. 0.91 in (23,1 mm), 10 per case
This connector has 5412R splice body and a 0.63 in (16 mm) O.D. This connector is to be used with molded rubber splice kits.
The 3M™ Connector CIR-3/0 is an extra long connector that is used to bridge gaps up to six inches when a piece of damaged cable is removed. They can be used with copper or aluminum conductors.