McDonnell & Miller (a xylem brand) - 173003 / 150S-HD referenced Head Mechanism product produced by high technology. 173003 / 150S-HD became irreplaceable of foundations. 173003 / 150S-HD referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. 173003 / 150S-HD referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.