Made of wood-root. Low moisture and hard to split material. Fitting into Fuji SKTS16 Reels Seats.
Max/Min OD : 27mm (1.06") ,23mm (0.90") / ID : 13.0mm(0.51") or 15.0mm(0.59") Optional/ L : 65mm (3.93") / Material : Natural Wood - Root
It can be different somewhat as it is natural wood.