2 pcs Carbon Fiber Neck Rods Guitar 440 mm

4mm x 7mm x 440mm Carbon Fiber Neck Rods Guitar Neck reinforcement Guitar Neck Stiffener for Electric Guitar Bass Parts
Items is 100% like the picture shown
Material: Carbon Fiber
Size: 4X4mm 6X6mm 3X6mm or 4x7mm
Length: 440mm 
A very light weight rigid option for neck building,
Carbon fiber reinforced necks to be surprisingly stiff and stable.
Stiffer necks possess more responsiveness and improved tone.
Stronger than an equivalent volume of steel, carbon fiber rods can supplement an adjustable truss rod to help prevent neck
twisting.
Durable and weather-resistant for a longer life cycle
Fit for electric or acoustic guitar necks