Apico rear axle blocks are manufactured using a high-grade 6061-T6 Aluminium. CNC machined for a perfect fit every time and unrivalled precision when aligning the rear wheel. They all come with an anodised finish with anti-corrosion properties and Laser etched alignment marks to assist you when adjusting your chain. REAR AXLE BLOCK - BLUE GAS GAS MC50 21-25 MC-E5 21-25 KTM SX50 20-25 SX-E50 20-25 HUSQVARNA TC50 20-25 EE-50 20-25