These are a set of four Mapleshade Isoblocks. For the money, they offer the best vibration absorption you can buy for $10. Each Isoblock is a square with a measurement of 1.75″ on each side and 0.75″ tall in height. The set is good for a weight load of up to 99lbs.
Cosmetically, they look good. Some wear from use but nothing major. The set will be securely packed for safe shipping.