The dimensions of the rubber o rings are based on the inside groove diameter (ID) of the indented seam of the outside rim. It means that the 1 inch grommet has a 1 inch indented groove width, and is about 1.3 inch in OD. and 0.68 inch in ID.
Quality rubber material:
Rubber grommets are made of quality, flexible and durable rubber material, they are of good electric resistance capability. And the rubber o rings will fit those drill holes precisely and efficiently.
Rubber grommets are designed for easy installation and click snap affixing drill holes, metal panels. Usually applied in holes in metal panels or other materials to protect cables, wires, cords from possible mechanical or chemical attacks, thus to protect the wires, cords, cables, etc. and give your furniture, electrical boxes a neat look.
Essential rubber gasket rings are for cars, RV wiring jobs, marine uses, leaky faucets, hoses repairing and so on, good tools kit for repair shops, electricians, movers, handymen, plumbers, etc.
Portable clear case:
180 Pieces of rubber grommets are packed in a storage case, you can carry it with you for RV trips and so on.
8 Sizes: 5/ 8, 7/ 8, 1, 1/ 2 , 7/ 16, 1/ 4 , 5/ 16, 3/ 8 inch
5 x 5/ 8 Inch rubber grommet
5 x 7/ 8 Inch rubber grommet
5 x 1 Inch rubber grommet
20 x 1 /2 Inch rubber grommet
25 x 7/ 16 Inch rubber grommet
40 x 1/ 4 Inch rubber grommet
40 x 3/ 8 Inch rubber grommet
40 x 5/ 16 Inch rubber grommet
1 x Snap-close case
Rubber seal rings set: this set contains 180 pieces of different sizes rubber grommets, packed in a clear plastic organizer case with snap close lid, portable and easy to store
Rubber grommets sizes: 5/ 8, 7/ 8, 1 inch(5 of each), 1/ 2 inch (20 pieces), 7/ 16 inch (25 pieces), 1/ 4, 5/ 16, 3/ 8 inch (40 of each), fit for your various needs
Quality material: made of flexible and durable rubber, and are of good electric resistance capability, seal rings will fit those drill holes precisely and efficiently
Convenient to use: o rings are designed for easy installation and click snap affixing drill holes, metal panels would create a neat finished look on furniture and electric boxes
Usage: rubber o rings are for wiring repair, etc. and can prevent metal-on-metal contact thus to protect wiring, cables passing through firewalls, metal panels and so on