2 Piece tote tank cover lid is made of heavy duty thick plastic, durable, threaded lid, comes with an o ring ,will be use for a long time. Screw-on cap for water haul trailer fit water tank or Tote, perfect great for liquid products' storage and transportation. To use 275-330 gallon ibc tote tank cover lid cap ensure the inner content clean and leak-proof. Suitable for IBC tank Inside dimension 163mm/6.42inch(Just a lid for the opening on top),the measured distance between two adjacent threads inside the lid is is 6mm/0.24inch. Water liquid storage lid cap with gasket will fit for Schutz, Mauser, Greif, Passport, Bonar, Ultratainer, Megatainer, Clawson, Mamor, Snyder & Many Other Brands & Models Of Plastic IBC's, Totes, Bulk Storage Containers & Spray Tanks...