Get Bit Baits Finesse Tube 3.5″ fits when fish are pressured or feeding on small baitfish and gobies. It’s a thinner-walled finesse tube with a glide-and-spiral fall for bottom-oriented bites.
Rig the Get Bit Baits Finesse Tube 3.5″ on a light jig head for a subtle fall, or stuff it over a football head jig for a goby-style bottom presentation.
Work both near bottom structure; the finesse tube is better for slower, more natural retrieves, while the DD tube is better for a faster fall and penetration.
When to switch
Switch to the DD tube when cover gets thicker or you need to get down fast.
Switch to the finesse tube when bites get tough, fish are suspended off bottom cover, or the water is clear and pressure is high.
If you meant something other than “walled,” send a bit more detail and I can narrow it down.