Packs of 120. Seperated from a pack of 1000 so will ship in a mailer inside the package The HydroShield Metal Insulation Plates SPGA3R-BWB are a pack of 100 3″ plates made by HydroShield Building Products. These plates are designed to provide insulation in various industrial and commercial applications. The plates are made of EPDM, TPO, and PVC materials, offering a durable and effective insulation solution for buildings and other structures. With the HydroShield brand and specific model, these insulation plates provide reliable performance and protection for various construction projects.