Immediate power for your penis and effective virility training with durable success! Simply insert your "best friend" through the tight, soft sleeve into the transparent cylinder and create powerful vacuum with the easy-to-handle pump ball with safety pressure valve. Your penis may become bigger, stronger and more powerful and this success may last with regular training! The transparent cylinder has 20cm length and 5.7cm diameter, with a stretchable soft sleeve made from ABS/TPE material.