Comes with 1-3/8" diameter (approx. 35mm) Glass Hole Cutter for our 3/4" bulkheads used with our Siphon Stopper® return fitting and a H2Overflow®/Siphon Stopper® drill template.
Glass Hole Cutter is intended for low volume drilling of approximately 5-10 holes. Could be more or less depending on glass thickness and other factors.
Please read our hole drilling instructions for more details. All holes drilled at your own risk - Please read our hole drilling disclaimer.