The files below were tested and found to be working. Each Stencils library is zipped into 2 parts.
Download both parts of the desired stencil library
Make sure to put both part1 and part 2 in the same folder
Install 7zip free program that can be found here.
Select both files. right click and select 7zip -> extract here. Do not try to extract one by one. They need to be extracted as a whole.
Ubiquiti Stencil Library for Visio
The download is comprised of 2 parts. It includes all the latest Ubiquiti stencils of all the current Ubiquiti products for 2018. Download both parts and extract to open in Microsoft Visio.
QNAP Stencils Library for visio
The download is comprised of 2 parts. It includes all the latest QNAP stencils of all the current QNAP models for 2018. Download both parts and extract to open in Microsoft Visio.