Across International Ai SolventVap 5.3-Gallon/20L Rotary Evaporator W/ Motorized LiftThe Ai SolventVap series 20L rotary evaporators is now ETL tested to UL CSA standard. This certification is required by many municipalities, and it also provides a higher standard of equipment safety and lifespan. Also come standard is the new plexglass bath cover. Specially designed for Ai 20L SolventVap rotary evaporators, this beneficial cover securely rests on top of the water bath and ensures the best possible temperature uniformity. SolventVap