These are incredibly high-quality Made in USA feet. They are made from incredibly strong BASF A3W Nylon 6/6 material, and the screws are extremely high-quality as well. I personally use these feet on tons of Marantz receivers--they are incredible. These measure 26.5mm OD (1.04") x 18.5mm H (.73"). Please see my pictures for details and measurements.
US shipping and handling is $5, and international is $18, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.