Built specifically for DEF inlets, the DEF Adapter lets your Tuff Jug spout fit securely into the smaller inlet openings found on most DEF tanks. No more forcing a standard spout into a tight fill neck or dealing with spills and backsplash — this adapter creates a snug, leak-free connection so you can top off DEF fluid quickly and cleanly
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DEF adapter fits the tank well but the no spill feature which is why I purchased Tuff Jugs became completely ineffective.
