The ring has a trapezoidal shape and is 4-1/2 inches wide at its longest point

the dispenser has a hemmed opening

Bradley S39-620 ASSembly- Ld-3010 Trap Cover Replacement Part

Cross Reference: ILG vent

Sani-Lav Stainless Steel Hand Sink, With Faucet, Floor Mounting Type, Stainless - 501L Nominal Size-18" X 1.25" The ring has a trapezoidalHand sinks and hand wash stations are commonly used to clean hands and wash food or other items in healthcare facilities, cleanrooms, and food service facilities. Hands free models have a sensor faucet, foot pedal, or knee pedal to start the flow of water through the faucet, reducing the risk of cross contamination from multiple users touching the sink. Hand sinks are smaller than hand wash stations and have one or more faucets. Hand wash stations are