Main part material: Magnesium alloy Rotation Mechanism: Large and integrated ball bearing Reel Lock Mechanism: Ratchet wheel with anti-reverse knob, aluminum alloy Diamete: 28 cm / 11 in Groove Depth: 4 cm / 1.6 in Groove Width: 3.8cm / 1.5 in Stand of Spinning line-guide: Aluminum Alloy Omni-bearing Line-guide: Aluminum Alloy Net Weight: 1.64kg / 3.62lb