TRP Hydraulic Brake Olive and Barb Pack Not The Kind of Olives You'd Put on Pizza If you need Olives and Barbs for your TRP hydraulic disc brakes, then you're in the right place. The TRP Hydraulic Brake Olive and Barb Pack is a set of 10 olives and 10 barb hydraulic hose compression fittings. Works for all TRP and Tektro hydraulic brake systems. The 5. 5mm size works for older TRP and Tektro hydraulic brake systems. The 5. 0mm size works for TRP DH-R EVO, Trail EVO, E-MTB, Quadiem, Slate EVO, and Slate T4. Features A set of 10 olives and 10 barbs The 5. 5mm size works for older TRP and Tektro hydraulic brake systems The 5. 0mm size works for TRP DH-R EVO, Trail EVO, E-MTB, Quadiem, Slate EVO, and Slate T4 | Trp | Hydraulic Brake Olive And Barb Pack For 5. 5Mm Hose, 10-Pack