First Alert BRK 10-Year Battery 6-Pack Hardwired Ionization Sensor Smoke Detector Item #31735 | Model #TL412CP Dissolves scale: lime from shower

Dissolves scale: lime from shower heads

but you could also rinse them out and use them again to reduce waste

303261-324

12-inch T x 8

First Alert BRK 10-Year Battery 6-Pack Hardwired Ionization Sensor Smoke Detector Item #31735 | Model #TL412CP Dissolves scale: lime from shower120V AC DC Interconnectable Ionization Smoke Alarm w 10YR Sealed Battery Backup (6 Pack) Precision Detection technology helps reduce cooking nuisance alarms and provides early warning. 10 Year battery backup provides continuous protection during power outages with no battery replacements required Latching Alarm Indicator visually identifies the unit that initiated the alarm or low battery Test Silence button allows for efficient testing and