3M - RT09C16G20NN referenced Filter Cartridge product produced by high technology. RT09C16G20NN became irreplaceable of foundations. RT09C16G20NN referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. RT09C16G20NN referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.