Linna 4 Use it to clean my apc-h sigma sensor that was ugly dirty. One good thing is that there is a notice on how to use it and that's rather rare in other cleaning sensor set I bought there wasn't. Cleaning liquid is ok and swabs are of good quality. Me passed several time on the sensor (yes not supposed to but was dirty) and it works rather well and better than other brand so yes I recommand this product. Packaging is well done and provide all you need to clean your sensor