INJORA Heavy 23g Brass Outer Portal Drive Housing Axle Cover for 1/24 FMS FCX24 Wagon Upgrade (FCX24-01)
Note: When working with some wheels such as INJORA wheels, this counterweight may rub against the wheel, please use wheel extenders. After my tests, this one works best:
5mm extended wheel hex
Suit For: 1/24 RC Crawler FMS FCX24 front and rear axles
Features:

• Precision CNC machined
• Etched with the INJORA logo
• Made of brass, single weight is 23g, improve climbing performance

Specifications:

• Part Number: FCX24-01
• Material: Brass
• Quantity: 2PCS
• Outer Diameter: 23mm (0.91in)
• Each Weight: 23g/pcs (0.81oz/pcs)