ITEM NAME:2x Aluminum Universal Drive Shaft for WLTOYS 12428 12423 Upgrade Parts Description: Quality materials and superb craftsmanship Preferred by knowledgable model hobbists and RC enthusiasts. Designed for lasting performance and long durability. Replacement accessories for WLtoys 12428 12423. Material: Metal Specification: Diameter: 8mm / 0.31inch Length: 85mm / 3.35incfh Package Includes: 2 Pieces Universal Rear Drive Shaft with Accessories DMO0006782319523020.2 Pieces Universal Rear Drive Shaft with Accessories. Designed for lasting performance and long durability.