The Altra Centrum 166 Premier Shafts are precision arrow shafts designed for archers who build their own arrows. With strict spine options, a 32" overall length, and careful weight matching, they deliver consistent performance for reliable tuning and repeatable results.

• Length: 32" total length
• Spine options: Available in 250, 300, 350, 400 spine
• Weight matching: Each dozen weight-matched to +/- 1 gn to minimize flight variance
• Quantity: Sold as 1 dozen shafts per package
• Components: Components not included; requires fletching, nocks, inserts, and points (sold separately)

These shafts are ideal for archers who customize their arrows for consistent flight and precise tuning. The weight-matched, fixed-length design helps you achieve tighter groups and predictable impact, while the available spine options let you tailor the setup to your bow and draw weight. Perfect for target shooting, field archery, or any scenario where consistent arrow performance matters.