These are velocity stacks for Honda VFR400 NC30 (OEM part No 16141-MR8-003). I finally sorted out something that they could be moulded from apart from NBR, which is garbage. Unfortunately the solution, Flourosilicone, is very expensive and mainly used in aerospace. For that reason I will only keep a limited amount in stock. 2500 THB (Thai Baht) shipped https://litetek.co/Velocity_Stacks_Honda_VFR400_NC30.html