Brand of Needles
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Perceived Sharpness
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Longevity of Sharpness
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Safety Features/ Membrane
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Consistency of Quality
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Stiffness of Membrane
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Color of Cartridge
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Plastic Quality
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Needle Metal
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Internal Stabilizer Features
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Ergonomic Features / Finger Rest
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Size Labeling on Cartridge
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Recycled/ Eco Friendly Plastic
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Recycled/ Eco Friendly Packaging
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Damage to Client's Skin
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Durability
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