The arms listed above are for reveals up to 4 1/2" and have a 8 3/8" long rod and shoe.
The arms listed above are for reveals from 4-1/2" to 8", and have 12 3/8" long rod and shoe.
The 4640 Extra Long arm is ordered as: 4640-3077 x ST-3088, for reveals between 8" to 11" maximum, and has a 16" long rod and shoe.
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