This blue spring is rated for 5" to 8

90-degree brass elbow specifically engineered as an OEM replacement part for Reznor unit heaters and duct furnaces

you can replace a lower-voltage capacitor with a higher-voltage unit like this 330V model

Provides a set of two keys to maintain a secondary backup in a technician's kit or on-site locker

this is the standard spark electrode for the popular LF24 series unit heaters

Belimo ZG-NMSA-1 Shaft Extension This blue spring is ratedThe Belimo ZG NMSA 1 Shaft Extension is a critical accessory for HVAC contractors performing damper actuator retrofits or new installations where existing drive shafts are too short to reach the actuator clamp. Engineered specifically for 1 2 inch diameter shafts, this extension provides an additional 3. 8 inches of length (with a 2 inch effective extension in some configurations), ensuring a secure mechanical connection between the damper and Belimo