The TA – is a light to medium load swab cup. The swab cup has two different size lips. ( 3) Thin lips across the swab cup act as the load bearing lip, while the ( 3) heavy section of the swab cup acts as the support for the thin lip. These are available in aluminum and steel inserts. Different compounds available. Available Size : 2-7/ 8" & 3-1/ 2"