Thank you for providing more details about the NSL Profile. Based on the information you've given, here's a detailed breakdown:

1. Composition: The NSL Profile consists of an aluminum channel. It offers a choice of insert materials for the tread and riser, allowing for a strong, contrasting solid band of color to be achieved.

2. Regulatory Compliance: It is designed to meet the guidance outlined in Approved Document M and BS8300:2009+A1:2010. These regulations typically relate to accessibility and building standards, ensuring the profile meets requirements for installations where no surface floor coverings are used or where resilient flooring is applied.

3. Insert Material: The insert material is an external grade Tredsafe Insert. This insert is manufactured from a special blend of materials including PVC, silica quartz, and polymeric plasticizer. It provides a homogeneous, hard-wearing surface suitable for both wet and dry conditions.

4. Anti-Slip Properties: The insert features a three-dimensional pyramid pattern, designed specifically to enhance slip resistance in both wet and dry conditions. This pattern ensures safety and stability on stairs.

5. Insert Color Selection: When choosing the insert color(s), it's crucial to consider the Light Reflective Value (LRV) of both the surrounding floor covering and the stair nosing itself. The difference between these values should be greater than 30 to ensure sufficient contrast, aiding visibility and safety.

6. Dimensions: The dimensions of the NSL Profile are specified as 75mm x 58mm, which likely refer to the dimensions of the aluminum channel and the overall profile size.

This profile appears to be well-suited for environments where safety, durability, and regulatory compliance are paramount, particularly in settings requiring accessibility adaptations and slip resistance.