preemo - 10 inch Dome Percolator Bong BaseThe Preemo 10 inch Dome Percolator Bong Base is one of the best bong attachments you'll ever buy. This Dome Percolator is designed with multi hole aeration that diffuses your smoke and pushes it outward in all directions for a smoother, cooler hit. How It Works: Attach this base to your existing bong setup or use it as is. The dome percs multi hole aeration system diffuses the smoke, allowing for optimal cooling and filtration. Simply connect it to