Grinnell - 20EPDM-TRI referenced product produced by high technology. 20EPDM-TRI became irreplaceable of foundations. 20EPDM-TRI referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. 20EPDM-TRI referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.