Silk'n comes with a 60 day money back guarantee.

Product Description and Benefits:
SAVE MORE WHEN YOU BUY MORE SILK'N CARTRIDGES AT ONCE.
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1 cartridge: $44.50/cartridge
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2 cartriges: $36.25/catrtide (save $17.50 - over 19% savings)
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3 cartridges: $35.75/cartridge (save $27.75 - over 20%)
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4 cartridges: $35.30/cartridge (save $38.80 - over 21%)
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5 cartridges: $35.00/cartridge (save $50.00 - over 22%)
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10 cartridges: $$34.50/cartridge (save $105.00 - over 23%)
Silk'n SensEpil Hair Removal Device is an FDA-Cleared, light based hair removal device that has been proven to be effective for use in the privacy of your home. The Silkn home device has been shown to achieve excellent, professional-level results in the legs, underarms, arms, and bikini line after only 4-6 hair removal sessions with Silk'n.
Each Silk'n SensEpil Hair Removal Device includes one lamp cartridge. Each lamp cartridge lasts for 750 pulses, which is about two full body treatments (legs, arms, underarms and bikini). If you are only treating certain body parts and not the entire body, each cartridge can last longer. If additional cartridges are necessary for your treatment, or if multiple people are using the device, replacement Silk'n Lamp Cartridges are available individually or in packs of three.