This is the bushing for the Forte Carbon Tube (FTC 225). Forte applies 4-axis continuous fiber braiding over an aluminum mandrel to produce extremely durable and tough carbon fiber tubes. The interlocking fiber braid is wet-out with epoxy resin. The end result is a seamless braided tube with very precise compression or bending characteristics.
Forte builds its parts to specific lengths and weights, and may be straight gauge or tapered. The FCT (Forte Carbon Tube) 225 requires a BU150-225 bushing and has an outside diameter of 2 1/2 in. (64mm), an inner diameter of 2 1/4 in. (57mm), and a maximum length of 12'.
PHRF sailors with 22-26' boats create spinnaker poles and prods out of these tubes by using Ronstan RFPNP168, Forespar UXP-150 FP304054 end fittings.