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What cylinder length is required for L9000 double cylinder functions with sectional Gen 2 indicators on 1-3/8" thick doors.

For L9000 units with indicators on 1-3/8" doors, conventional cylinders must be 1-1/4" in length. The conventional cylinder requires the longer 1-1/4" length (rather than 1-1/8") because a compression ring and spring are used to space the cylinder out and cover the extra cylinder length.

SFIC and FSIC cylinders use standard lengths with the appropriate blocking rings. 


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