Rear Brake Master Cylinder Rebuild Kit for 5/8” bore master cylinder. Made in Japan Fits 1982-Early 1987 Harley FXR Models (Super Glide/II, Sport Glide/Grand Touring, Disc Glide, Low Glide/Custom, Low Rider) Comes with Metal Plunger/Piston, Seal, Cap, Spring, Isolator, Spacer & Snap Ring. Replaces HD# 42382-82A