•   •  Used on some Starcraft or Monark pontoons
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•   •  Made of aluminum
• 
  
•   •  Outside dimensions used
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•   •  Dimensions approximate on radius measurements
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  Dimensions:

•     •  Height: 3-9/16” to 3-5/8” 
•     •  Top: 4-1/16” to 4-3/16”
•     •  Top: 3¼” to 3-3/8” 
•     •  Diagonal Length: 5-5/8” to 5¾”