Men's Vacuum Pump B5X9 with 5 suction modes and automatic pump function for size increase Purpose built silicone pocket training tool extender pump with five suction modes and an automatic pump mechanism to support size increase during use Transparent cylinder with clear scales allows you to observe changes in real time, helping you track progress and assess effectiveness Made of TPE and ABS materials, lubricatable for smoother operation and greater comfort during use Safe and effective training method with no side effects; regular use can help users become stronger and last longer Practical applications At home: use as part of a routine training program to monitor progress and improve performance over time Before intimate activity: prepare and condition for enhanced endurance and stamina Routine conditioning: integrate into a regular schedule to support long term strength and resilience