Andis Stainless Steel D-4 Replacement Blade, This Andis blade is designed for use with the Andis power trim cordless trimmer. Blade is made of high-quality stainless steel for long-lasting performance. Square blade set is used for very close trimming. Size 30 Andis blade has a 1/150-inch blade cut. Measures 4-1/2-inch length by 3-4/5-inch width by 4/5-inch height.