Note which color of thread will be shuttle 1 vs. shuttle 2.
With Shuttle 1: R 3-3-3-3 (Cl R and RW after each Ring)
Add Shuttle 2 thread and Ball thread to pinch.
Begin a chain, tatting with both shuttle threads as base thread:
Ch 4-4-4 (RW after each Chain)
*With Shuttle 2: R 3+3-3-3
Ch 4-4-4 (tatting with both shuttle threads, as before)
With Shuttle 1: R 3+3-3-3
Ch 4-4-4 (tatting with both shuttle threads)
Repeat from * 2 more times.
With Shuttle 2: R 3+3-3+3
Ch 4-4-4 (tatting with both shuttle threads)
Cut and tie ball thread ends together, or thread one of shuttle thread ends on a needle and thread it through the back of a ds near base of first ring. Finish ends as desired, or use as a decorative stem.