If you order an aquarium from us we can pre-drill a 2-3/8" (approx 60mm) hole for your H2Overflow® 1-1/2" bulkhead.
Cost shown is per hole.
Package specials may come with holes already drilled, please read the details of the package. We can drill holes in our most common pre-determined configurations, or drill to order wherever you like. Please provide detailed drawings and specifications.