Lot of 25 Rubber Grommets 1/2 '' Inches Inside Diameter Package : 25 Rubber Grommets Specs : Inside Diameter : 1/2 '' Groove Width : 1/8 '' Groove Diameter : 3/4 '' outdoors Diameter : 1 '' Thickness : 1/2 '' Can be secondhand to seal holes, on pvc pipes, protect wires from sudden objects and more past uses. Durometer - 60 Can be secondhand indoors or out of doors.