Blow away the dust on your camera lens, delicate camera parts, or old slides with this Optic Lens Cleaning Blaster from Monoprice! This air blaster features a one-way air inlet valve, so dust and dirt won't get sucked into the bulb, only to get blown back out onto your lens or camera internals. The rubber bulb measures 3 3/4" long by 2" diameter. The red air nozzle adds 2" to the total length. The plastic nozzle is 5/16" in diameter. 30-day easy returns. No restocking fee. Free lifetime technical support. 1 year warranty.