TR21-A | 10K OHM NTC NON-LINEAR TEMP WALL MODULE (AVERAGING ONLY) 10K TYPE II Incl. Vendor Surcharge $43.10 SKU: TR21-A MANUFACTURER: Honeywell Parent Item Parent Item - Additional Cost Has Item Option Quantity -+ If you add this item, you're only $757 away from free shipping! Add to Cart Add to Cart Current Stock: 6 Details TR21-A | 10K OHM NTC NON-LINEAR TEMP WALL MODULE (AVERAGING ONLY) 10K TYPE II DetailsBackDetailsTR21-A | 10K OHM NTC NON-LINEAR TEMP WALL MODULE (AVERAGING ONLY) 10K TYPE II