Amazon.com: 6" Long x 2" Wide x 1" Thick, Aluminum Oxide Sharpening Stone : Industrial & Scientific
4" Aluminum Oxide Sharpening Stones - Gritomatic
Bora 501060 8" Fine/Coarse Combination Sharpening Store Aluminum Oxide Two Sided Stone For Sharpening Knives, Woodworking Tools & Many Others - Amazon.com
6" Long x 2" Wide x 1" Thick, Aluminum Oxide Sharpening Stone - Walmart.com