The Bridgeport 1221 Aluminum 3-1/0 to 3-4/0 Oval Service Cable Entrance Cap ensures a secure connection point for 3-1/0 to 3-4/0 oval service entrance wires. Operators can utilize the two holes with 25/32" diameter to connect service entrance wires. The cap’s aluminum construction is ideal for long-term use in most environments. Our service entrance caps are engineered with the quality and innovation that allows contractors to save time and money on every job. When you need quality electrical fittings for more efficient jobs, look for Bridgeport Orange.