Hey there, if you've got a 1-Tank EasyWring spin mop that's seen better days, this 4-pack of replacement heads is exactly what you need to get it working like new again! These triangular mop heads measure about 6.3 inches across the outer rim and are specifically designed to fit the 1-Tank EasyWring system perfectly. Just a heads up - these won't work with the 2-Tank RinseClean models, so double-check which mop you have before ordering. What's great about having four replacements is that you can rotate them out more frequently, ensuring you always have a fresh, clean mop head ready to go. The microfiber material is super absorbent and perfect for tackling spills and dirty floors without leaving streaks. When one gets too dirty, just swap it out for a fresh one and keep cleaning - no more waiting for mop heads to dry between uses! They attach easily to your existing mop base and spin just like the original heads, giving you that same efficient wringing action that makes mopping so much less messy. Having multiple replacements means you can designate different heads for different areas if you want - maybe one for kitchen spills, another for bathroom floors. Seriously, if your current mop heads are looking tired and worn out, this affordable 4-pack will extend the life of your favorite spin mop without having to buy a whole new system. It's one of those simple replacements that makes household cleaning so much more convenient!