The Wall Tube for a trap in a kitchen sink installs easily to form a P type trap with corresponding size J Bend.
RECOMMENDED PROCEDURE
FOR INSTALLATION:

1. Turn off water at the tap.
2. Remove old trap.
3. Remove nuts and washers A, B, C and D from J Bend.
4. Slide nut D the entire length of wall tube, as illustrated.
5. Slip flange over wall tube.
6. Connect wall tube to stub-out or wall connection.
7. Put washer C on wall tube.
8. Place nut A and washer B on tailpiece.
9. Position J Bend. Hand-tighten nut D on wall tube