Boners Penis Pump Number 1 S/M measures 9.5 inches in total length the cylinder by 2.1 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 Boners penis pump. Apply some water-based lubricant to the opening and to your penis and let your penis glide inside. Start pumping using the squeeze ball 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 small size, which makes it perfect for beginners. Made use body safe materials Thermoplastic Rubber TPR, ABS Plastic. Color transparent clear. Good Warranty 90 days.