【Application】Our aquarium hose adapter can connect and convert water hoses with different inner diameter. 【Multiple options】 Suitable for 12mm/20mm pipe, 16mm/20mm pipe. 【Top quality material】 This aquarium hose converter is made of good quality plastic material, wear resistant, corrosion resistant, durable. 【Easy to use】 Easy to use, just insert the hose into the adapter. Nice accessory for the home aquarium.