Weaponized Pro Ultra Light Titanium Bolt QR Seat Post Clamp Ultra LightThe Weaponized Pro Ti QR seat post clamps are made from 6066 Aluminium, they are CNC machined to reduce weight. By incorporating a titanium bolt weight is further reduced.Colours:Anodised Red or Black31.8mm or 34.9mmIncredibly light at 18g for the 31.8 and 20g for the 34.9