Black Flip 0-Zero Electronic Vibration StrokerWith a firmer material than the original Flip Zero EV, the Black edition offers stronger sensations and a tighter squeeze. Rumbling vibrations from within the elastomer sleeve bring a stimulation from another world to your hands. This is made possible with yet another TENGA engineered first: two Vibrating Cores are housed inside the elastomer for direct stimulation! Push the button on the top to cycle through five settings. The external pressure pads