What is this?Double Sided Wire Grommet, for protecting wires, cables, cords and pipes away from rough surfaces. Widely used in house, office, industry, boat, etc..What will I get?The black oval grommets, is in size of: Drill Hole Size: 26 x 12 mm / 1.02 x 0.47-inch(L*W); Groove Thickness: 3mm; Inner Size: 25 x 10.5 mm / 0.98 x 0.41-inch(L*W); Overall Size: 30 x 16 x 9 mm / 1.18 x 0.63 x 0.35-inch(L*W*H)In the package of: 10 x rubber grommetsAre there any advantages of the product?It is made of rubber, soft, durable and heat resistant. The grommets offers a wide selection of diameters, tight or loose your cord, please make center holes as needed.How to use it?Drill a hole on your plate first, then open holes for your wire on the grommet, lastly, mounting to finish.What should  I notice?The rubber material may smell not good. Please choose the proper size for your project before purchasing.