BoG Products 4.5' Bike Cable Lock with Light 1/2" Self Coiling Combination Cable with Soft Plastic Coating. STRONG ~ 1/2" (12mm) Diameter Steel Braided-Cable - 4.5 Ft Long. Plus It's Scratch Resistant COMBINATION LOCK ~ Easy to Change Code System SELF COILING SYSTEM ~ Compact and Easy to Carry MOUNTING SYSTEM ~ Install on Your Seatpost LED LIGHT ~ Light Up your Numbers - Easily Enter Your Codes At Night for Quicker Release