Water-proof Carry Bag -- Research has shown over 85% of fiber optic network failures are caused by contamination on the optical connector end-face. For best optical performance, it is imperative that all optical fiber connections are clean and free of contaminants This is a Practical and Useful Tool Kit -- We carefully select and group those fiber optic cleaning products which are essentials for your fiber optic cleaning tasks. They can effectively and quickly clean connector end-faces, remove dust, oil, and other debris A Cost-effective Fiber Optic Cleaning Tool Kit -- Fiber Clean Cassette can be used more than 550 times for FC, SC, ST, LC, while 1.25mm / 2.5mm One Click Fiber Cleaner Pens can be used more than 800 times. Low cost per clean Superior Quality Products for Wide Application -- for using on fusion splice prep, connector end-faces on jumpers and through bulkhead adapters, can effectively prepare fusion splicing, clean connectors, maximizing network performance Material: plastic+metal colour: as shown Package Contents: 1 x Fiber Cleaning Cassette 1 x 1.25mm Cleaning Pens 1 x 2.5mm Cleaning Pens 1 x 1.25mm Cleaning Cotton Swab Kit(100PCS) 1 x 2.5mm Cleaning Cotton Swab Kit(100PCS) 1 x Dust-free Paper Kit(50PCS) 1 x Air Blowing and 1 x Brush 1 x Alcohol Pump Bottle 1 x Water-proof Carry Bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.