Material: high impact ABS plastic (can not be used on hot engine parts) Application: for hex head nut or bolt with a 1/2" (measuring from flat side to flat side) wrench or socket, interior or exterior   Size: 1/2" inside diameter, 3/4" outside diameter,  5/16" tall Installation: push on Color: black Part Style: hex head, dome cap Quantity for sale: set of 10 caps Bulk Packaging New