Auto Penis Pump Kit – Fitted Cylinder with Automatic Vacuum Pump Designed for men looking to improve erection quality, increase temporary fullness, and support long-term size-focused training, this auto penis pump kit gives you a controlled pumping setup with a fitted clear acrylic cylinder and automatic vacuum pump. Each kit is built for men who want a more precise fit than oversized generic cylinders. A properly fitted pump cylinder helps improve comfort, seal quality, expansion control, and overall pumping consistency. The included auto pump makes pressure management easier by allowing you to fill to your working pressure, stop the pump, and set your session timer based on your routine. This makes the kit a strong option for users who want a more convenient pumping setup while still using a fitted cylinder system. Our fitted cylinders are made from clear acrylic and use industry-standard fittings for easy connection to the included auto vacuum pump and silicone tube. Kit Includes: Auto vacuum pump 16-inch silicone tube Clear acrylic fitted cylinder How to Use the Auto Pump Press the power button to begin filling the cylinder to your desired working pressure. Once you reach your target pressure, press the power button again to stop the pump. To adjust the timer, press and hold the timer button, then press again to change the session time shown at the top left of the screen. Adjust the time based on your experience level and routine.Ways to Pump Recommended Starting Pressure For beginners, we recommend staying within a controlled working pressure range of 15–25 kPa. Do not chase maximum pressure. Proper fit, controlled pressure, and consistency matter more than aggressive pumping. Use our Pressure Conversion Calculator if you need to convert between kPa, inHg, or other pressure measurements. Current Cylinder Sizes We currently carry the most common fitted cylinder sizes. Maximum Recommended Erect Girth by Cylinder Size 1.75-inch cylinder: up to 5.5 inches erect girth 2.0-inch cylinder: up to 6.25 inches erect girth 2.125-inch cylinder: up to 6.66 inches erect girth 2.25-inch cylinder: up to 7.0 inches erect girth 2.5-inch cylinder: up to 7.85 inches erect girth Try our Size Calculator. Leave Room for Expansion For best results, choose a cylinder that allows room for expansion without being excessively oversized. We recommend allowing 10–15% room for expansion based on your current erect girth. To calculate your recommended cylinder capacity: Current erect girth × 1.10 to 1.15 = recommended expansion range Example: A 5.0-inch erect girth × 1.10 = 5.5 inchesA 5.0-inch erect girth × 1.15 = 5.75 inches In this case, the 2.0-inch cylinder would usually be the best fit because it allows room for immediate pump expansion and long-term progression. We do not recommend choosing a cylinder with an internal circumference more than roughly 30% larger than your current erect girth. For easier sizing, use our Size Calculator. Important for Men with Wide Bases If your base girth is your widest measurement, use your widest base girth when selecting your cylinder size. The general recommendation is to measure from your thickest point. However, if you have an exceptionally wide base and want to focus more expansion higher on the shaft, you may choose to size based on your mid-shaft girth instead. Smaller Sizes While we work on sourcing smaller fitted cylinders, men under 4.0 inches in erect girth may need a smaller cylinder from another supplier that better matches these sizing recommendations. Useful Full Links Watch our full penis pump guide covering cylinder sizing, pressure control, beginner routines, water vs air pumping, erection quality, temporary expansion, and long-term size-focused training. Watch our full penis pump guide covering cylinder sizing, pressure control, beginner routines, water vs air pumping, erection quality, temporary expansion, and long-term size-focused training. Safety Note Use controlled pressure and avoid over-pumping. Extended cock ring wear may cause discoloration, fluid retention, or minor lymphatic issues. Use at your own risk and remove immediately if you notice pain, numbness, unusual discoloration, or discomfort.
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