Worldwide free shipping over $29.00 USD 0.15mm annealed brass wire is suitable for very small Ronghua, 0.2mm annealed brass wire is generally used for ordinary Ronghua, and 0.25mm annealed brass wire is recommended for velvet row with a width of 8cm to 10cm The 0.15mm brass wire is relatively soft, making it more difficult for beginners to practice sharpening. Brass wire of 0.25mm and above has higher hardness and is more difficult to twist. The length of a single brass wire is related to the width of the velvet row that needs to be made. It is not recommended for beginner to make velvet rows that are too wide, as this will be more difficult. Friends with a limited budget can make Annealed Brass Wire by yourself. I have wrote an article about how to make Annealed Brass Wire, click here to see it. For the basic tools required for beginners learning Ronghua, you can refer to this article: Basic Tools and Materials for Making Ronghua