Global O-Ring AS568-012 Viton O-Ring - Black - 75 Durometer - Pack of 125 Well Slug and Washers attach the unit

and Washers attach the unit together

Power supply is UL / CSA / CE approved

Harmony XB5/ZB5 are 22 mm plastic modular push buttons

Automatic backlight during alarm

Allow 2 week build time for portable unit

Global O-Ring AS568-012 Viton O-Ring - Black - 75 Durometer - Pack of 125 Well Slug and Washers attach the unitAS568 012 Viton O Ring Black 75 Durometer An O ring is a round, mechanical gasket designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal interface. O Rings are one of the most common types of seals because theyre inexpensive, reliable, and have simple mounting requirements. O Rings are one of the most common types of seals because theyre inexpensive, reliable, and have simple mounting requirements.