Crabworx Extra Fine Crab Gravel, 4.4-Pound, Rainbow This extra fine gravel makes the ideal bottom substrate for land hermit crabs Gravel can easily be cleaned with the crabworx beach scoop Crabs feel like they are on a beautiful beach in the tropics Measures 11-inch length by 7-inch width by 1-1/3-inch height This product weighs 4.4-pound