11 (high) x 11 (across at base) x 4 (deep at base). This is used, but looks to be in great condition. I do not know who made this, but most of the stuff we get from this lab is from MDC, Varian or Huntington Labs. This looks to be a custom job, but may work perfect for you.
This has a gate inside that you cant access it, unless you unbolt the top from the bottom. This is heavy and used for heavy duty purposes, literally 15 or 20 pounds of aluminum. The item "HUGE MDC Varian Vacuum Gate Valve Chamber with Viewing Port 11 x 11 Heavy Duty" is in sale since Wednesday, November 7, 2018. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Vacuum Chambers". The seller is "crochrc" and is located in Minneapolis, Minnesota.This item can be shipped worldwide.