- Designed specifically for metric fountain pens, this single-piece feeler gauge offers precise thickness measurements ranging from 0.02 to 1 mm. - Its clearly defined thickness specifications ensure accuracy, making it an essential tool for meticulous adjustments and fine-tuning of your fountain pen. - Crafted from durable material, this gauge delivers reliable performance, providing you with peace of mind for all your writing needs. Key Benefits: - Achieve precise measurements for optimal pen performance, enhancing your writing experience. - Perfect for adjusting nib height or ink flow, allowing for a customized writing style and improved pen functionality. - Compact and easy to use, it fits seamlessly into your pen maintenance routine. Applications: - Use it to evaluate and modify nib thickness for personalized writing preferences. - Ideal for fountain pen enthusiasts who require accurate adjustments to improve ink delivery and overall performance. - Suitable for both amateur and professional users seeking to maintain their writing instruments at peak condition.