1. Material: The default is aluminum alloy rod, carbon fiber rod is a customized model with no regular stock;
2. Length: 7.5m aluminum alloy rod (only rod length), 7.3m carbon fiber rod (7.5m including brush head);
3. Wall thickness: 1mm for all aluminum alloy rods (manual/single/double-head/roller brush);
4. Insulation: Sponge handle and nylon bristles are completely non-conductive, safe for use;
5. Section number: The number of buckles +1 = the number of rod sections (e.g., 4 buckles mean 5 sections).