Item Type: Wireless Speaker Wall Mount BracketMaterial: Metal, EVASuitable For: for Sonos Era 300 Wireless SpeakersStand Base Size: Approx. 110x90mm / 4.3x3.5in Package List2 x Speaker Stand Assembly4 x Expansion Tube7 x Screws2 x SpacersManual measurement, please allow slight error.1Specially Designed: Speaker wall mount bracket is designed for Sonos Era 300 wireless speakers, perfectly compatible. 2Durable: Wireless speaker wall holder is made of premium 3mm thick metal material, solid and durable. 3Anti Wear: Speaker wall holder has EVA cushioning material in contact with the wireless speaker, which can protect the speaker from wear and tear. 4Easy To Install: Speaker wall mount bracket comes with screws for easy installation. Front hidden design, after installation, only the speaker can be seen from the front, more beautiful. 5Space Saving: Wireless speaker wall holder base size is 110x90mm / 4.3x3.5in, which can provide you with the best space efficiency.