◆ Ball chain for roller screens, shades, etc. [White] Approximately 7.4M (creates a loop of approximately 3.7M) and 1 joint. [Unused]. ◆ The diameter is approximately 4.8mm, with 9 balls per 10cm interval. ◆ I believe it is compatible with current products from TOSO, Nichibei, and Tachikawa, but please confirm with the photos and make your purchase at your own discretion.