Metal construction with heat sink fin design. Help to dissipate excess voltage and heat. Improve charging capability, prevent overcharging battery. Oversized heat sink fins design for maximum heat elimination. Efficiently improve charging capabilities. Direct replacement to your original unit. This is Non-OEM product, accessory only! Fitment: Suzuki GS500 2004-2011Suzuki GS500K 2001-2009Package Included: 1 x Regulator Rectifier