These come in packs of 32, the circle stickers are 20mm in diameter, or just over 3/4 inches. They are designed to be placed over a 1/2 inch hole. We recommend using four per light to provide maximum airflow.
To install, drill a 1/2 inch hole on your light. We recommend 2 along the top and 2 on the bottom, but you can choose anywhere that has a flat surface. Clean the hole and stick on the patch, holding firmly for 5 seconds to ensure good adhesion. That's it!
These are shipped worldwide for free by postal service. When ordering with other items they will be shipped together, If only the patches are ordered they will be shipped in an envelope with a stamp so delivery times may be a little longer.