This assortment of carbon fiber inserts are specifically designed to work with the CRB Premium exposed reel seats. Various colors and sizes are included. See chart below for exact fitment details.

Length 88mm. Inner Diameter 14mm(.551″) . Available in two sizes, 15.0mm O.D. and 15.5mm O.D. and in four colors : B (Black), BL (Blue), G (Gold), R (Red)

Size 15.0mm Fits CRB GEC2, GEC3 and EXS Reel Seats
Size 15.5mm Fits CRB NTR Reel Seats
Inside Diameter for both 14mm(.551″)