This is a Royal R8 Collet with a size of 1/8 inches.  It measures 4 1/8" long.  The shaft is 15/16" wide.  The top of the collett is a 1/4" wide.  The shaft is 3" long.  It is compatible with a range of 5C collets.  Any questions please ask. Buyer is responsible for all shipping costs including returns. Thank you.