About the Connectors:

The ChiaoGoo cord connectors allow you to securely attach multiple cords together to create a custom length. Sold by the pair.

IMPORTANT  NOTE: 

Products with small joins are designated by the letter "S". They are only compatible with other "S" ChiaoGoo products. Needle tips US 2 - 8 are "S" products.

Products with large joins are designated by the letter "L". They are only compatible with other "L" ChiaoGoo products. Needle tips US 9 - 15 are "L" products