My church still uses the old style florescent lights. After a recent repair the covers due to their age were very brittle and broke. It was hard finding these covers, but by chance I happen upon this website and they had exactly what I needed and at a good price. When I received the covers they were very securely wrapped and fit perfectly.
Under Cabinet Lens: 1-11/16" wide x 1" high (4113RE-315RW-)
Great product. Looks like it was part of the ceiling fixture. Arrived quickly and was exactly as described.