3- For the small chain n2, you right one end is similar to chain n1 to allow to put out stone beads from the chain and also allowing to put the chain n2 on the chain n1 or on the S shaped earring. the other end is a small conic stopper bead ( this conic bead must be around 3,5mm of diameter and 4mm heigh.
The chain n2 is 3,5cm long without take into account the end bead and the clasp.
Best regards