The Oster Super Steels A5 Replacement Blades are perfect for grooming your furry friend. Made in the USA, these blades are durable and efficient. The 4F size is ideal for achieving a length of 3/8 inch on your pet's coat. This pack includes one blade, which is suitable for use with Oster A5 clippers. The black color adds a sleek and professional look to the blades. Trust in the Oster brand for quality grooming products that will keep your pet looking their best.