We can produce carbon fiber arrows with the specifications you required.
Specifications:6.2*7.5*711(28'')mm, 6.2*7.5*762(30'')mm, 6.2*7.5*813(32'')mm.
Straightness: 0.004''
Spine: 300, 340, 400, 500.
Materials: carbon fiber.
Practice Carbon Fiber Arrows