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            "q": "How much volume does one click deliver on a reusable peptide pen?",
            "a": "Most research pens deliver about 0.01 ml per click, but this is set by the manufacturer's screw pitch and is not standardized across brands, so always check the spec for your specific pen."
        },
        {
            "q": "What is the dead volume of a 3 ml peptide pen cartridge?",
            "a": "Expect roughly 0.05 to 0.15 ml of diluent trapped in a 3 ml cartridge and pen attachment after the plunger bottoms out, which can shift your final reconstituted concentration if you do not account for it."
        },
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            "q": "Can you use bacteriostatic water in a reusable peptide pen cartridge?",
            "a": "Yes. Bacteriostatic water is the standard diluent for research reconstitution and is compatible with glass cartridges and rubber stoppers, though you should flush the cartridge with sterile water after non-standard diluents."
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