Review on Premium Glass Top Bumpers: Clear 20mm Anti Slip Pads - Set of 30 - Non Adhesive Medium Rubber Pads for Glass Table Top by Darren Neal

These glass inserts are beautifully finished and of high quality. They stick well to the glass and countertop and prevent the glass from slipping. They are barely visible under glass. Delivery was very fast! The reason I'm only giving four stars is that they are a lot thicker than similar pads we've used in the past - maybe I should have found that out before buying. This leaves a gap of about 1/8 inch between the table and the glass, which is great for airflow but tends to create more "noise" when objects are placed on the glass surface. Assuming thickness doesn't matter, I highly recommend this product.