Optimist racing boom fork or end fitting . This boom end fitting is made of thick , high-quality, fiberglass -reinforced nylon. It ensures a secure fit around the mast, guaranteeing smooth and simultaneous rotation of the mast and boom. For 40mm racing booms (Optiparts EX940).
- Inner diameter: 28mm
- Outer diameter: 38mm
- Opening: 44mm
- Length: 71mm