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  1. #1
    GREENMACHINE's Avatar
    GREENMACHINE is offline Are you green enough?
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    Syringe size really does matter

    Needle....Nominal O.D.
    Gauge.....mm........inches.
    10..........3.404.....0.1340
    11..........3.048.....0.1200
    12..........2.769.....0.1090
    13..........2.413.....0.0950
    14..........2.108.....0.0830
    15..........1.829.....0.0720
    16..........1.651.....0.0650
    17..........1.473.....0.0580
    18..........1.270.....0.0500
    19..........1.067.....0.0420
    20..........0.902.....0.0355
    21..........0.813.....0.0320
    22..........0.711.....0.0280
    22s.........0.711.....0.0280
    23..........0.635.....0.0250
    24..........0.559.....0.0220
    25..........0.508.....0.0200
    25s.........0.508.....0.0200
    26..........0.457.....0.0180
    26s.........0.467.....0.0184
    27..........0.406.....0.0160
    28..........0.356.....0.0140
    29..........0.330.....0.0130
    30..........0.305.....0.0120
    31..........0.254.....0.0100
    32..........0.229.....0.0090
    33..........0.203.....0.0080
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    Last edited by GREENMACHINE; 06-19-2006 at 05:01 AM.

  2. #2
    Assapopolis is offline Junior Member
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  3. #3
    toofatbuilder's Avatar
    toofatbuilder is offline Associate Member
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    Quote Originally Posted by Assapopolis
    thank god im not the only one.....lol

  4. #4
    C_Bino's Avatar
    C_Bino is offline $BAM-7246~AR-Hall of Famer
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    Ya, I got no idea what is going on here either...

  5. #5
    GREENMACHINE's Avatar
    GREENMACHINE is offline Are you green enough?
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    The first figure is the one that most concerns you. An 18g needles has an edge to edge width of 1.270mm. A 25g is 0.508mm edge to edge. First impression would suggest that an 18g is approx 2.5 as big as a 25g needle. It is actually leaves closer to 6.25 times a bigger puncture in your skin.

    Remember how to find the area of a cirle Pi(R)squared. so we need to square the radius of both to compare them correctly.

    When you puncture your skin the size of hole is relative to the size of the needle. The needle makes a circular puncture in your skin

  6. #6
    GREENMACHINE's Avatar
    GREENMACHINE is offline Are you green enough?
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    Okay I've toned it down, to the bare basics. I have a lot of experience regard specifications, tolerances, conrol limits etc. I understood the info I posted, I forget sometimes that, this isn't stuff everyone understands.

  7. #7
    C_Bino's Avatar
    C_Bino is offline $BAM-7246~AR-Hall of Famer
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    Oh ok I see now. Thanks for the info. Regardless though I will continue to use the same way. Always worked out well.

  8. #8
    GREENMACHINE's Avatar
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    I'm thinking in terms of newbies who want to know if it okay to use an 18g instead of a 23g. I don't expect experience bro's to take anything from because they have enough sense to know which needle to use. I was trying to display numerical that there really is a sizeable difference between different gauges of needles.

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