A rigid, straight aligner with a feed through where the line at the front exits the aligner. A creation that has been used in carp fishing for years. And for good reason.
Where in the past this type of aligners with silicone tube and heat shrink tubing were made (by pulling the line through this tube with a boilie needle to the front), we now have it ready. Easy to use and just as stiff as heat shrink tubing. Why make it difficult when it can be done easily?