This manually operated pump features a soft silicone sleeve and a classic bulb-style handle for simple use. Its clear cylinder allows visual control, while the quick release valve ensures convenience and ease. Available in multiple colors to suit your preference. The cylinder measures 23 cm in length and 6 cm in diameter. WARNING: Please read product manual before using any type of vacuum pump orconstriction ring. Stop using the devices immediately if you experience any pain or discomfort.