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Credit
ST-4250-4499
Modern compression caps 158mm - 247mm (6.25" - 9.75")
ST-4273
Size:
171mm (6.75")
Example in Photo:
Westinghouse (USA)
Photo Credit:
Connor Stoehr
Direct link to this insulator:
http://www.allinsulators.com/photos/ST/4250-4499.php#ST-4273
