Trinity TBF-LINERS01-4818 48 x 18 in. Shelf Liners, Pack of 4, 4 - Kroger
Plastic Shelf Liner - 48 x 18", Black H-2435BL - Uline
Amazon.com - Slendor Wire Shelf Liner Value Pack of 5 Heavy Duty Waterproof Non-Adhesive Industrial Strength Plastic Mats for Tier Shelving Unit, 18 x 48 Inch Clear
Sterling Shelf Liners 17.375-in x 4-ft Frosted Clear Shelf Liner in the Shelf Liners department at Lowes.com
Wire Shelf Liners 18 x 48 Inch, Set of 5 with Bonus S-Shaped Hooks – altCooking Hub