or 1" pvc pipe fittingsFits hole size 1 5/8" - 2 1/8"Use glass hole saw 1 3/4" Connection: 1" Slip x 1" Slip or 1" FPT x 1" FPTPlastic bulkhead fittings should be used any time a hole is made through glass or acrylic to simplify the attachment of plumbing pieces. The use of a Plastic bulkhead fitting will help ward off stress cracks and leakage.

• Glass Construction — Constructed from glass — carefully selected for durability, safety, and long-term performance in your pet's environment.
• No Assembly Required — Ready to use straight out of the packaging — no tools, no complicated setup, just immediate use.
• Perfect for All Aquariums — Thoughtfully designed to meet the specific needs of all aquariums — a product that genuinely understands your pet.
• Built to Last — Premium materials and quality construction ensure lasting performance and durability through everyday use.
• Great Value — Exceptional quality at a competitive price — everything your pet needs without unnecessary compromise.