I’ve never seen this before, but it looks straight forward to build. The inside dimensions are 4" x 6". You need a hydraulic press, and plate steel for the box and lid. The lid should fit smoothly in the top, it should all be about 3/4" to 1" thick. You can bolt together all the walls and base. The top should have a boss that meets the hydraulic ram.
I’ve never seen this before, but it looks straight forward to build. The inside dimensions are 4" x 6". You need a hydraulic press, and plate steel for the box and lid. The lid should fit smoothly in the top, it should all be about 3/4" to 1" thick. You can bolt together all the walls and base. The top should have a boss that meets the hydraulic ram.
I think you should look into the specs. This thing isn’t just a hydraulic press. It imparts heat and evacuates all oxygen from the chamber.