Length: 45cm, Handle diameter: approximately 3cm. Installed by a renovation contractor; product name and manufacturer unknown, but it's a reliable product. It has non-slip grooves. There are no noticeable scratches or stains on the handrail, but the screws have been used once, so there is some gypsum board attached. The screw threads are not stripped. There are no installation instructions, but I've included images of how to remove it for reference. Also, I've used an illustration from a similar item listed by someone else (image 6). I've also added the installation instructions from a different handrail I purchased at a home center. This may help you understand the installation position (image 7). Please use it in areas where you need to step up and down or perform movements, such as toilets and entrances. It has been disinfected with alcohol.