( the BU is a Brass tube ) this is standard per manufacturer
Allenair - ED 2 X 3 BU CHF referenced product produced by high technology. ED 2 X 3 BU CHF became irreplaceable of foundations. ED 2 X 3 BU CHF referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. ED 2 X 3 BU CHF referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.
