Narchery Carbon Hunting Arrows, 31 Inch Bow and Arrows with Removeable Tips, 350 Spine Practice Arrows for Recurve Bow, Compound Bow, Long Bow (12 Pcs);

Product Description
Narchery Carbon Hunting Arrows, 31 Inch Bow and Arrows with Removeable Tips, 350 Spine Practice Arrows for Recurve Bow, Compound Bow, Long Bow (12 Pcs)
â–²Material: Mixed Carbon
â–²Carbon content: 80% carbon
▲Arrow weight: 4.5g, ±0.15g (70 Grains ± 2.3 Grains)
▲The whole arrow weight (including the arrow): 28.5g, ±0.1g
â–²Rod inner diameter: 6.2mm/0.24"
â–²Rod outer diameter: 7.5mm/0.3"
â–²Rod length: 77.6cm/31"
❤Straightness: ±0.005 (five thousandths of straightness)
❤Spine: 550-700 spine (under 50 Pound)
â–²Packing: 12 arrows, 12 replacement arrows
â–²After-sales: Due to objective reasons, if you have any quality problems
with the package, please contact us in time, we will deal with it immediately, thank you for your trust.
Popular science knowledge
❤Spine: The hardness of the arrow refers to the index of whether the arrow itself will be
damaged after the arrow is shot. It is necessary to select the appropriate bow according to this index.
For every 5 pounds added, the spine should be reduced by 50.
❤Arrow weight: refers to the weight of the arrow, the basic unit is "Grains", 1 Grains = 0.665g
❤Straightness: Describes how straight the arrow is. When you buy the arrow, look at the
arrow from the end of the arrow. Rotate the arrow. If you don't see the center of the arrow
swing, it means the arrow is straight and will not affect the flight quality,
0.006 (6 thousandths) straightness to meet the reliability of daily practice and use, 0.003 (3 thousandths) belongs to the professional competitive class arrow