Brought these to fit inside a custom built drawer in a bookcase.
The build quality is great, the bearings in motion are virtually silent and smooth when sliding. They also come greased and in sealed bags to avoid dust getting into the mechanisms. These are used for drawers in the bottom of two bookcases and have been in use for over 2 months with no problems.
Couldn't find runners this short in local builders merchants. Would order these again and recommend!
Were delivered quickly.