Hydrofarm HGGR50 (25 Pack), 1/2 Rubber Grommet, Black

great

perfect fit had no problems no water leaks . would buy again if needed .

3/4 hole and these fit perfect.

So just to clarify the 1/2 is outside diameter so I think that makes the inside diameter 3/8. I will still put them to use just frustrating when I needed inside diameter to be 1/2

Item was exactly what I wanted unfortunately I bought them too small. But the material is thick and sturdy. Will be buying bigger size with same manufacturer.

Happy with product

excellent and reliable. I use these for Dutch-bucket hydroponics, and also in construction for water buckets for chickens. I have not found any that leak.

Great working.

perfect

Great product Easy to install with 13/16 inch bit and no leaks