Business Source Book Rings, 1-1/2" Diameter, 500/BD, Silver (BSN01438BD) Pack of 500Book rings are great for variety of uses such as loose leaf, memo filing, key rings and sample holders. Design features a bright nickel plated finish. Standard sizes are precisely made to ensure simple opening and firm closure. General Information Manufacturer: Business Source Manufacturer Part Number: 01438BD Brand Name: Business Source Product Name: Standard Book Rings Marketing Information: Book rings are great for variety of uses such as loose