Thank you for choosing Aerospace-Aviation360 for Part Number RFS2040 by Hawker for model Hawker 800, 850 ,900 which is described as Stationary Disc . This is an ASAP Semiconductor owned and operated website. We are a leading supplier of aircraft Corporate Brake parts like RFS2040. You have 24/7 x 365 access to our diverse product database with the fastest lead times in the industry.