Brand new 200pc Material: Plastic. Lightweight, strong pressure resistance and sturdy. Smooth edge, will not hurt the cable housing Applicable: 4mm shift cable and 5mm brake cable Package includes: 100 pcs derailleur end caps + 100 pcs brake end caps, total 200pcs Prevent the steel core in the brake pipe from breaking the stop bolt under the strong tension during braking, affecting the normal braking function.