Rubber grommets are very popular and very easily customizable, which means they can be found in various shapes, types, and sizes. The size of a grommet is determined in several ways. The defining sizes of a rubber grommet are inner diameter, outer diameter, groove width, overall width and several others. From what we’ve learned from our years-long experience, people most commonly choose rubber grommets based on inner and outer diameter, as those two are the most important characteristics of a rubber grommet. And, while we’re on the subject of popular sizing options for grommets, a 1/2 id rubber grommet is one of the most popular ones.

A 1/2 id in the 1/2 id rubber grommet stands for 1/2 inner diameter, meaning that the inner opening of a grommet is half an inch wide. That is not a large opening, so not a lot can be run through it, but what you can expect is an excellent protection for both cabling and the hole.

A 1/2 id rubber grommet is one of our most popular products, mainly due to the standardized sizing in various industries, although if you were to look for a hole-appropriate size option, you would look for the outer diameter – not the inner one. Now, a 1/2 id rubber grommet won’t seal or insulate a hole because it is not a plug, but what it will do is protect the edges, as well as anything that goes through it. And, most importantly, it will continue to protect both for a very long time because rubber is one of the most durably and resilient materials in the world, regardless of whether it is natural rubber, neoprene or silicone we’re talking about. All of them will be sufficient to make a rubber grommet that will last for years, regardless of the application or use-case scenario.