Products › Splicer / Joiner for Tubing Image 1 of 5 Image 2 of 5 Image 3 of 5 Image 4 of 5 Image 5 of 5 Splicer / Joiner for Tubing $5.00 Stainless steel splicer fitting for joining different sizes of tubing. Color: 1/4" x 1/4" 1/4" x 5/16" 1/4" x 3/8" 5/16" x 5/16" 5/16" x 3/8" 3/8" x 3/8" Add To Cart Added! Stainless steel splicer fitting for joining different sizes of tubing.