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Continue to Chat(NEW VENDOR) SOPHOS APXZTCHCB Sophos APX Product Accessory Sophos APX Mounting bracket kit for plenum & flat ceiling mount (for APX 320, 530, 740 only) https://www.c2-computer.com/zh-tw/products/new-vendor-sophos-apxztchcb-sophos-apx-product-accessory-sophos-apx-mounting-bracket-kit-for-plenum-flat-ceiling-mount-for-apx-320-530-740-only