Thank you for choosing Aerospace-Aviation360 for Part Number RFS1050 by Hawker for model Hawker 800, 850 ,900 which is described as Rotating Disc Segment . This is an ASAP Semiconductor owned and operated website. We are a leading supplier of aircraft Corporate Brake parts like RFS1050. You have 24/7 x 365 access to our diverse product database with the fastest lead times in the industry.