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GemOro Ultrasonic Cleaner. This is another tool that didn't work well with mixed metal jewelry and I have stored it way too long. It probably doesn't have 20 hours of use on it! I think it is a 3 quart model (it holds 3 quarts of water). The tank dimensions are 9.25" wide x 5.25" deep with a depth of 3.75". The heater and ultrasonic vibration work well. The timer which is also the on/off is broken. Use your own timer and unplug it when done. It also has a drain hose so you don't have to cary it to the sink to empty it. The hose may need to be replaced after sitting around for so long. I'm not sure how much I paid for it but it was over $300.00. I am asking $75.00. 