... competitions. Used in Olympic Games and IAAF Diamond League BQ-4 Aluminum Alloy Javelin for Men's Competition1. Javelin is made ... javelin is between 25mm and 30mm.3. Javelin body takes on a streamline shape with even change, and there are no ... as cell, bump, groove, ridge, and voids on the surface.4. Javelin body takes on a streamline shape with even change, and there ...