4329 large neoprene washer, 8-pack, made of black neoprene material, designed for use with nuts, bolts or screws, providing a reliable seal and dependable strength in relevant applications. Fits for most applications that require 3/4 ID x 2-1/4 OD x 1/8 in. neoprene washers, compatible with common fastener assemblies used in various scenarios. Made of high-quality neoprene, the washer can resist oils, grease and food grade acids, with a greater bearing surface to prevent fasteners from pulling through the material. Precise size: 3/4 inch ID (inner diameter), 2-1/4 inches OD (outer diameter), 1/8 inch thickness, consistent with standard specifications for easy matching. Simple and convenient to install, no special tools required, can be directly matched with nuts, bolts or screws for quick assembly in relevant applications.