Feature:Made of rubber, soft, durable and heat resistant.With pre made slot, easy to drill hole.The grommets offers a wide selection of diameters, tight or loose your cord, please make center holes as needed.Application:To protect wires, cables, cords and pipes away from rough surfaces. Widely used in house, office, industry, boat, etc..Specification:Type: Double-SidedMaterial: RubberColor: BlackShape: Oval Drill Hole Size: 35 x 20 mm /1.38 x 0.79-inch(L*W)Groove Thickness:2.5mmInner Size: 32 x 16 mm / 1.26 x 0.63-inch(L*W)Overall Size: 40 x 25 x 9mm / 1.57 x 0.98 x 0.35-inch(L*W*H)Package Content:4 x Electrical Rubber Grommet.