Each collet is well packed in separate protective container with label, moreover, each collect is mark with size, so it's easy to distinguish them.
Specification:
Type: ER25
ER25 Spring Collet made of high grade spring steel
The accuracy can be controlled within 0.0005".
Collet size: 1/2",1/4",1/8",3/8",5/8",3/16",5/16",7/16",9/16",7/32",13/32", 17/32"
Package include:
12pcs ER25 Collets