Check the listing for details. 1/2" barbed bulkhead fitting for Hydroponics system/Aquarium/etc. . Color: Gray, Condition: New. Listed at 3.50 USD. 1/2" barbed bulkhead fitting for Hydroponics system/Aquarium/etc. . These fittings have a higher throughput than the Botanicare 1/2" bulkhead fittings. Our bulkheads have an output radius of 1.1cm to Botanicare's .95cm. They also have a much smaller form factor. Botanicare's require a 1.25" (1 1/4") hole to be drilled. Our's only requires a 0.625" hole (5/8"). Each fitting includes 1 rubber grommet to prevent leaking. CUSTOM thread lengths and fittings available. (Need a long nozzle or thread? Contact us) This bulkhead accepts "add-ons" such as: Filter/Strainer - https://www.ebay.com/itm/303427564728 Height Extension (for increasing fluid level) - Link Coming Soon Condition is New. 3D Printed with PETG. Shipped with USPS First Class Package.