The Pelco LD53PB-0 is the lower dome (bubble) portion of a Spectra III and Spectra III SE system. It cannot be used with the Heavy Duty, Pressurized or Stainless Steel series of Spectra III systems. A Spectra III system is made of individual key components, each available for separate purchase. This way you can easily replace or upgrade a part of the system without having to acquire a whole new system.
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