1. Create an Online Store: Set up an e-commerce website or use an established platform like Shopify, WooCommerce, or BigCommerce to create your online store. Make sure your website is user-friendly, visually appealing, and provides detailed information about your products.

2. Product Listings: Create dedicated product pages for each of your FIA flat brush products (FIA2130, FIA2140, FOA2150, FIA2160, FIA2175). Include high-quality images, detailed descriptions, specifications, and any unique selling points.

3. Categorization: Organize your products within the "PAINT BRUSH AND ROLLER" category. This makes it easier for users to navigate and find the products they're interested in.

4. Search Engine Optimization (SEO): Optimize your product pages and website for search engines. Use relevant keywords (e.g., "FIA flat brush," "paint roller," etc.) to improve your website's visibility in search engine results.

5. High-Quality Imagery: Provide clear, high-resolution images of your products from different angles. Good visuals can significantly impact a customer's decision-making process.

6. Detailed Descriptions: Write detailed and informative product descriptions. Highlight the features, benefits, and potential uses of each product. Address any common customer questions preemptively.

7. Pricing and Offers: Display accurate pricing information for each product. Consider offering bundle deals, discounts, or promotions to attract potential customers.

8. Secure Payment Options: Integrate secure payment gateways to facilitate smooth and secure transactions on your website.

9. Shipping and Returns Policy: Clearly outline your shipping options, estimated delivery times, and return policy. Transparency builds trust with customers.

10. Customer Reviews and Testimonials: Showcase customer reviews and testimonials for your products. Positive feedback from previous buyers can encourage new customers to make a purchase.

11. Social Media Presence: Create social media profiles on platforms like Instagram, Facebook, and Pinterest. Share engaging content related to your products and the painting industry. Use relevant hashtags to increase your reach.

12. Content Marketing: Start a blog or create informative content related to painting tips, DIY projects, and product guides. This can help establish you as an authority in the industry and attract organic traffic to your website.

13. Online Advertising: Consider using online advertising platforms like Google Ads and social media ads to promote your products to a targeted audience.

14. Email Marketing: Collect email addresses from interested customers and send out regular newsletters featuring new products, promotions, and helpful painting tips.

15. Collaborations and Partnerships: Collaborate with influencers, bloggers, or other businesses in the painting or home improvement niche to expand your reach.

16. Analytics and Optimization: Use analytics tools to track the performance of your website and marketing efforts. Adjust your strategies based on the data you gather to continually improve your online presence and sales.

By following these steps, you can increase the visibility of your FIA flat brushes and related products in the "PAINT BRUSH AND ROLLER" category and make them easily accessible to users on the network.