Option: 3329
1125 - High Cycle Shaft Construction
6002 - High Cycle Const. 20 Cycles Per Day
8055 - 100,000 Cycle Springs and High Cycle Construction
9004 - Ul Smokeshield Label. Must Add Release Device to be Tied Into Alarm System If Not a M100 System
7908 - Flush Mounted Close Test Key Switch Nema 1 for M100 With Built In Automatic Reset Release Device. Im # 520256