grooved mechanism case

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The 99 and 33A have  grooved mechanism case and cover plates and the 98 an 35A have smooth mechanism case and cover plates.  There is no difference in durability between a 98 and a 99 exit devices.
The conversion kit does not contain a new mechanism case cover plate.  If a cover plate is desired you would need the Fire or Less Dogging Cover Plate for EL conversion kit and panic cover plate fo...
Tube or channel a pushpad panic resides in