SOLD - This VWR Aquasonic ultrasonic cleaner, model 550D, has a 20.8-liter (5.5-gallon) capacity, and frequency range of 38.5 to 40.5 kHz. This ultrasonic cleaner has a 0 to 99 minute timer, and is equipped with both heat and degas. Condition: Excellent. Previously-owned/used. Clean, tested, fully operational. Sold "as is" without manufacturer's warranty expressed or implied. Buyer is responsible for determining the suitability of this product for their application.