[MAIN PARAMETER] Mounting Size /Drill Hole Size: 44 x 20 mm /1.73 x 0.79-inch(L*W); Groove Thickness: 2.8mm; Type: Double-Sided. [OTHER SIZE] Inner Size: 42 x 17 mm / 1.65 x 0.67-inch(L*W); Overall Size: 48 x 24 x 10mm / 1.89 x 0.94 x 0.39-inch(L*W*H). [MATERIAL] Made of rubber, soft, durable and heat resistant. [HOLE ADJUSTABLE] The grommets offers a wide selection of diameters, tight or loose your cord, please make center holes as needed. With pre made slot, easy to drill hole. [APPLICATION] To protect wires, cables, cords and pipes away from rough surface. Widely used in house, office, industry, boat, etc..