This Standard 250 tri-tap magnetic metal halide ballast features:

• Ballast Style: F-Can
• Circuit Type: CWA
• ANSI Code: M58 or H37
• Input Voltage: 120, 277, 347V
• Input Frequency: 60Hz
• Power Factor: 0.9
• Minimum Start Temp: -20°F
• UL 1029: A
• Dimensions: 13.75" L x 3.19" W x 2.63" H

See document below for complete specifications.