Aluminum Alloy Downhill Short Stem CNC Machined 31.8mm MTB Bicycle Handlebar Stem for Mountain Bike. Customization Options: Supports customization for color, logo, design, packaging, and carton labels. One Year Warranty: Provides a comprehensive one-year warranty for all mechanical defects. CE and ISO9001 Certified: Meets international standards with CE, BSCI, EEC, and ISO9001 certifications. Aluminum Alloy Material: Constructed from durable aluminum alloy for lightweight performance. CNC Machined Precision: Features CNC machined 31.8mm stem for high precision and reliability. Multi-Color Customization: Offers various color options to meet specific customer requirements. Fast Delivery Time: Batch orders shipped within 7-15 days after deposit confirmation. Secure Packaging: Products packed in bubble bags and hard cardboard boxes to prevent damage.