This is a brand new spark plug wire clamp from Accutronix, made in USA.

 The material is chromed aluminum, with a stainless steel allen screw

 holding the halves together.

 Fits any spark plug wires 8.8mm or smaller diameter.

 Some dimensions:

 Overall length 1-3/16" (30mm)

 Width 1/2" (13mm)

Brand new part in original Drag Specialties package. See photos for details.