Which of the following is not a guttering material?

Brass is not commonly used as a guttering material. The primary materials for gutters are aluminum, vinyl, and copper, each selected for their durability, weight, and cost-effectiveness.

Aluminum is lightweight, resistant to rust, and can be easily formed into different shapes, making it a popular choice for residential rain gutters. Vinyl, while also lightweight and resistant to rust, is an option primarily due to its affordability and ease of installation. Copper is valued for its aesthetic appeal and longevity, although it comes at a higher cost.

Brass, while a material used in various plumbing fixtures and decorative elements, does not typically serve as a practical option for gutter systems, which require materials that can withstand outdoor elements and draining functions. Thus, brass does not fit the common categories of guttering materials.