15 pairs of universal seat belt stopper sets are included. Each set contains 15 male and 15 female seat belt stop buttons. The quantity is enough for daily use Universal design: our black belt buckle button has a diameter of 16.3 mm and fits most seat belts in cars, trucks or SUVs Reliable material: the lockable seat belt button stopper is made of durable plastic, offering strength and wear resistance. It is not easy to deform or break and is built for long service life Practical function: the car seat belt button stopper prevents the seat belt from slipping. It helps keep the buckle in place so you can drive with confidence Compatibility and performance: designed to work with a wide range of belt systems, providing stable performance under normal driving conditions How it helps you: once installed, the stopper maintains belt position during movement, reducing belt adjustments and distractions 2-3 use scenarios - Daily driving in passenger cars where belt buckles tend to slip during shifting or seat adjustments - In fleet or shared vehicles to keep belt positioning consistent for different drivers - In larger vehicles like trucks or SUVs where belt slippage can occur after loading or reconfiguring seating Material and size details - Material: durable plastic - Diameter: 16.3 mm - Color: black Package contents - 15 pairs of universal seat belt stopper sets, with 15 male and 15 female buttons per set Note: This description preserves the original product specifications, functions and intended use without adding or omitting details.