Click to expand Tap to zoom Siemens (Pyro) | DB-HR Detector Base Relay Surface Low 4-Wire 4 Inch SKU PR-F1D2-6558 Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $78.99 | / Availability: Out of stock call for lead time 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart