Hi, and thank you for your question. These rubber grommets are not recommended for dishwasher use.
Hi and thank you for your inquiry. We apologize it will not fit an electrical box. The dimensions are 31/32 OD 1/2 ID 9/32 Thick and a groove diameter of 3/4.
Hello Cowboy, Thank you for your inquiry. The groove diameter is 3/4" and the groove width is 3/32".
Fifteen items are included.