Feature●These Pop Back-up Rivet Washers are perfect for Repairing Boats, Trailers, Aircraft, Race Cars and many more.●Perfectly made of High Quality Aluminum material, Anti corrosion and Rust Resistance. It can be used indoors and outdoors, Very Durable and Life long Usage.●Dimensions: 4.76mm Inside Diameter ,12.7mm Outside Diameter (Quantity 300) | Material: Aluminium Package Includes 300PCS Rivet Washers●Wide Application-- It can be used for boats, cars, planes, farm, household and other projects; Lightweight and can be stored easily.Description