Bundle of 3 items: LeLuv Maxi Penis Vacuum Pump with Blue Handle, Soft Black TPR Seal & 4 Sizes of Constriction Rings. Specially designed to be used with or without any sleeve, the extra-thick clear, seamless, untapered cylinder is graduated in both inches and centimeters up the side. The LeLuv Maxi Blue Pump Handle is the choice for those who will not compromise function and quality for anything.TPR Sleeve: Made from soft and pliable TPR that is delicate on the skin, this sleeve is perfectly designed for pumps sized 1.75" to 2.75" (4.5 cm to 5.8 cm) and is the perfect accessory for trapping vacuum vacuum within the cylinder.Stretchy Constriction Rings: Simply stretch over the cylinder and insert your member. The constriction acts like a usual penis ring and helps create firmer, longer-lasting erections.For beginners, it is important to start the pumping process slowly to avoid discomfort. Remember to use the quick release valve if the vacuum becomes too severe. Continue pumping/releasing air until you've found a suitable level of vacuum. The penis should look swollen but should not hurt. Keep an appropriate amount of vacuum on your penis and wait 20 minutes. Once the session is complete, clean the cylinder and any accessory with warm water or arcrylic/silicone-safe cleaner. Let dry before storing.