Features: Crafted from high strength PC material, this motorcycle helmets base ensures secure mounting for JIEKAI JK 316 and AIS 607 helmets, offering enhanced stability during high speed rides. The lightweight construction features a unique structural design to prevent wobbling or detachment, with tool free installation for quick helmets attachment. Designed for motorcycle enthusiasts using for JIEKAI JK 316 or AIS 607 helmets, it prioritizes riders safety and convenience during extended journeys. Maintains helmets stability under strong winds and high speed conditions, ideal for highway cruising, sport riding, or windy weather adventures. Optimized for impact resistance and aerodynamic performances, this helmets mount securely anchors your gear while reducing vibration during aggressive maneuvers. Specifications: Material: PC Size: about. 12x8x3cm/4.72x3.15x1.18in Color: Black Applicable Model: for JIEKAI helmets JK 316 model, AIS 607 Package Includes: 1 Pair Motorcycle helmets Visors Gear Base Plate note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.