The bulbs are exactly as shown and work amazing for alcohol ink art. You can blow steady or fast for varying results. | The blower worked for multiple designs. It is easy to squeeze and the strength of the air pressure is up to the artist. Very useful tool to manipulate the ink and create lovely artwork. | The rubber squeeze bulb allows you to control the flow of air by adjusting the amount of pressure you use. | These air blowers never need electricity, batteries or refills. They can always be used, as opposed to compressed gas containers or electric air compressors. | Suitable for succulent plants cleaning, mobile phones, camera, SLR lens, filter digital, computer, keyboard, Sensor, Screen and Other Electronics.