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Quantity
1
Designed specifically for The Mark Advanced Dark Spot Concentrate, The Key is a weighted gold squeeze key engineered to work seamlessly with its aluminum tube. Creates steady, even pressure as you roll, guiding the formula forward without b...
Reviews
4.8
147 ratings
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The Key is a great addition to have. It helps the product to rise to the top which makes it easier to apply. I totally recommend.
R
Rosie · May 19, 2026
Comes in handy when trying to squeeze out the last of the amazing product! Vwry useful!
