Boners Penis Pump Number 2 Large measures 12.6 inches in total length the cylinder by 1.9 inches in width. For larger penis and harder erections. A water based personal lubricant if needed. Always clean after use with warm water and an antibacterial soap. Give your penis more volume with this large penis pump. Apply some water-based lubricant to the opening and to your penis and let your penis glide inside. Start pumping using the finger pump and watch your penis grow a little each time. With the air pressure release button, you can release the vacuum at any time. The pump has a large size, which makes it perfect for more experienced users. Made use body safe materials Thermoplastic Rubber TPR, ABS Plastic. Color transparent clear. Good Warranty 90 days.