Letgoing Mountain Bike Hydraulic Disc Brake DOT and Mineral Oil Bleed Kit for AVID Formula Hanyes Echo Shimano Tekro HS33 Magura Nutt This is professional bike brake bleed kit, compatible with Most Brake Systems In the Market 7pieces adapters apply for Avid, Formula, Hayes, Fox, DTSWISS, Rockshox, Bengal, Quad, Echo,Giant Brake System and Fork,Shimano, Magura, Tektro, Hope Compatible with Both Mineral and DOT Fluid, but same one cylinder do not exchange from DOT and Minerial Oil. Professional Bleed Block, Close caliper and adaptor, have english detail user guider, so easy to operate it.