LifeLine Tektro Universal Olive Insert and NutThis 12 piece kit is specially tailored for use with Tektro hydraulic disc brakes. It includes four copper olives, four inserts/barbs and four steel nuts. The inserts/barbs are designed to fit 2.5mm inner diameter hose for Tektro brakes. The olives are designed to fit 5.5mm outer diameter hose and the nuts are M8 x 0.75mm for 5.5mm outer diameter hose.Features: Use: Road, Mountain Bike (MTB) Compatibility: Tektro hydraulic disc brakes Included: 4x Copper Olive, 4x Insert and 4x Steel Nuts Suitable for Tektro hydraulic brake hose Insert/Barbs are to fit 2.5mm (Inner diameter) hose for Tektro brakes Olives are to fit 5.5mm (outer diameter) hose Nuts are M8 x 0.75mm for 5.5mm (outer diameter) hoseManufacturer's Part Number: LL-TUOIN Gold 12 PieceBuy LifeLine Components from Chain Reaction Cycles, the World's Largest Online Bike Store.