Welcome to our store! 1. Uses ethanol-free, special microfiber. 2. Replaceable core. 3. Suitable for FC/SC/LC/MU/D4/DIN and other fiber optic connectors. 4. Lightweight and portable design. 5. Fast and effective cleaning. Features: * Uses ethanol-free, special microfiber. * Replaceable core. * Suitable for FC/SC/LC/MU/D4/DIN and other fiber optic connectors. * Lightweight and portable design. * Fast and effective cleaning. Specification: Type: Optical Connector Cleaner Model Number: KC-550 Material: Special Microfiber + Advanced Plastic Core: Replaceable Application: For FC/SC/LC/MU/D4/DIN and other fiber optic connectors Cleaning Times: >500 times Cleaning Effect: -20 to -50dB (return loss) Operating Temperature: -20 - 50 ℃ Storage Temperature: -40 - 60 ℃ Applicable Dust-Free Grade: >CLASS10000 Weight: Approx. 167g Size: Approx. 18 x 8.5 x 3 cm / 7.1 x 3.3 x 1.2 inches Package List: 1 x Optical Connector Cleaner Note: Please allow a slight error due to manual measurement. Thanks for your understanding. Please note that the new type and the old type of this product will be sent randomly, and make sure you don't mind before ordering. Guaranteed Satisfaction: Customers are our top priority. If you find any problems with the product, please contact the seller immediately. We strive to provide satisfactory after-sales service.