Features: Package: Includes 100Pcs brake cable wire tip cap, 100pcs for 4mm derailleur/ 100pcs for 5mm brake cable, optional. Material: Black color, made of quality plastic material. Lightweight, strong pressure resistance and durable. Size: 4mm length: 18mm, suitable for variable speed lines tube with a diameter of 4mm; 5mm length: 17mm,suitable for brake lines with a diameter of 5mm. Advantages: Smooth edges, will not hurt the cable housing. Function: Prevent the steel cores in the brake pipe from breaking the stop bolts under the strong tension during braking, affecting the normal braking function. Specifications: Material: Plastic Color: As The Picture Shows Style Options: 2 Style are Available as Shown in the Picture. Length: approx.17mm/0.67in Inner Diameter: approx.5mm/0.19in (More Size Detail, Please See Photo.) Package Includes: 2 Kinds of Package(Optional) Package 1: Set of 100Pcs Brake Cable Wire Tip Cap Package 2: Set of 100Pcs Bike Derailleur Shift Cap note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!