Coming from Hiro Seiko is their new line of high-viscosity differential fluids. Available as 100,000cps, 200,000cps, 300,000cps, 500,000cps and 1,000,000cps variants the pure silicone oils are ideal to lock the gear differentials of on-road cars or as friction damper lube. The fluids come in convenient 30ml containers and they are available now.