The Delkin Devices Sensor Scope Sensor Solution Refill Kit includes (1) 0.25 oz. bottle of Sensor Solution and serves as a supplement to your complete Sensor Scope Camera Sensor Cleaning System (sold separately). Intended to be used alongside Sensor Safe Wands, this solution will keep you fully equipped to maintain the cleanliness of your valuable DSLR or mirrorless camera. This streak-free, low residue formula is scientifically engineered to safely break down stains, oils and chemically bonded debris on the surface of DSLR & mirrorless image sensors and low pass filters. The non-conductive alcohol-free nature of the solution makes it the safest formula for use with electronic devices and components and air travel friendly.