(Material :100% pure carbon arrow. 5)Arrow Heads : 75grain. spine 600 OD =7.04 mm 5.4gpi. spine 500 OD =7.1mm 5.8gpi. Spine 200 OD=7.85MM 11.74gpi. spine 300 OD =7.47mm 8.48gpi. spine 350 OD=7.38mm 7.64gpi.
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