Carbon Express Mach 5 5mm Arrow Shafts 200 Spine 12 Pieces Black. Made from an advanced lightweight carbon matrix it maintains stable forgiving flight even at extreme distances. 360 degree spine consistency supports uniform shaft behavior for clean launch characteristics and reliable broadhead control. With straightness rated to +/- 0.002 inches max and weight tolerance of +/- 1.0 grains it delivers repeatable accuracy with simplified tuning. Specifications for Carbon Express Mach 5 5mm Arrow Shafts: Manufacturer: Carbon Express Color: Black Fabric/Material: Carbon Quantity: 12 Shaft Length: 32.8 in Diameter: 5 mm Features of Carbon Express Mach 5 5mm Shafts: 5mm Arrow Shaft Design Advanced Lightweight Carbon Matrix Construction Built For Maximum Arrow Speed Ultra-Flat Trajectory Performance StableForgiving Flight Characteristics 360 Degree Spine Consistency For Uniform Shaft Behavior Straightness: +/- 0.002 Inches Max Average Straightness: +/- 0.001 Inches Weight Tolerance: +/- 1.0 Grains Components: Bulldog Nock Collars5mm Aluminum Sleeved 2-Piece 40 Gr Inserts Available in spines 200 250 300 350 400 Package Contents: Carbon Express Mach 5 5mm Arrow Shafts Carbon Express CX05834: Mach 5 5mm Arrow Shafts 200 Spine 12 Pieces Black