We guarantee the authenticity of the item. However, we will take measures to prevent swapping. CAMPAGNOLO SUPER RECORD Chainring + Screws 50/34T Set. Condition: Brand new, unused. Accessories: No accessories other than those shown in the images are included. This product is a chainring set (outer 50T + inner 34T) and mounting bolts for Campagnolo’s “SUPER RECORD” series. The compact gear ratio of 50/34T provides a lighter gear configuration, making it well-balanced for both flat terrain and hills and climbs. Compatible with SUPER RECORD (Ultra-Torque series) and compatible Campagnolo cranks, as long as they have the correct BCD and bolt pattern. Gear Teeth: Outer 50T, Inner 34T. Configuration/Type: Double (two chainrings) + bolt set. Compatible Speeds: 12-speed drivetrain (compatible with SUPER RECORD 12S). BCD/Bolt Pattern: Campagnolo-specific Asymmetric BCD inner diameter 112 mm (4.4 in) / outer diameter 146 mm (5.74 in) equivalent Based on crankshaft configuration. Chainring Material/Construction: The chainring body is made of 7075 aluminum with a hard anodized finish. The outer ring is also available in a hybrid configuration with a carbon support and aluminum teeth (this construction is used in the “ULTRA” chainring). You can order in bulk with other products, and price negotiation ispossible. This applies to all electronic items that have not been tested for operation with respect to junk items. Please check the voltage before ordering. Except for our overseas compatible products, the voltage is Japanese specification (AC100V 50/60HZ). For those in 120V-240V regions, please use a down transformer. I promise to deliver our products toyou safely, securely, and carefully. For the other countries. Please check by lists or ask us directly. They will return to their original state when opened. During the end of November to the end of December, most ofshipping will be delayed, so please order for Christmas in November. Your satisfaction is our priority and I promise to offer a pleasant shopping experience to you. I try to satisfy the customer. Thank you very much for looking at this item. International Buyers – Please Note. Thank you for your understanding.