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 A and B and washers from J Bend.
4. Slide nut B the entire length of wall tube, as illustrated.
5. Connect wall tube to stub-out or wall connection.
6. Place nut A and washer on tailpiece.
7. Position J Bend. Hand-tighten nut B on wall tube and nut A on tailpiece to J Bend.
8. Align parts and hand-tighten nuts. Run water to test for leaks.

Hacksaw, pipe or spud wrench