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The main system for measuring the diameter of a hypodermic needle is the Birmingham gauge (also known as the Stubs Iron Wire Gauge); the French gauge is used mainly for catheters. Various needle lengths are available for any given gauge.
The French scale, also known as the French gauge or Charrière system, is a widely used measurement system for the size of catheters. It is commonly abbreviated as Fr but may also be abbreviated as Fg , FR or F , and less frequently as CH or Ch (referencing its inventor, Charrière ).
The least popular sizes are the 10 gauge and the 16 gauge; while far less common than the other four gauges, they are still commercially available. [citation needed] [9] Shotguns and shells exceeding 10 gauge, such as the 8 gauge, 6 gauge, 4 gauge, and 2 gauge are historically important in the United Kingdom and elsewhere in mainland Europe ...
The Birmingham gauge is also known as the Stubs Iron Wire Gauge or Birmingham Wire Gauge and is distinct from the Stubs Steel Wire Gauge and the British Standard Wire Gauge. It is commonly referred to simply as gauge (abbreviated as G ), [ 3 ] but this should not be confused with the French gauge , a separate system used for measuring the outer ...
Generally speaking, 12 gauge shotguns produce more felt recoil than 20 gauge shotguns simply because 20 gauge is a smaller cartridge and usually contains less powder and less shot. However it is entirely possible to manufacture a 20 gauge shell that is more "powerful" than a 12 gauge shell.
32 gauge — .526 in (13.4 mm) 28 gauge — .550 in (14.0 mm) 24 gauge — .579 in (14.7 mm) 20 gauge — .615 in (15.6 mm) 16 gauge — .663 in (16.8 mm) 14 gauge — .693 in (17.6 mm) 12 gauge — .729 in (18.5 mm) 10 bore — .775 in (19.7 mm) 8 bore — .835 in (21.2 mm) 6 bore — .919 in (23.3 mm) 4 bore — 1.052 in (26.7 mm)
Blade extracted from disposable self retracting blood lancet with ruler for scale. A blood lancet, or simply lancet, is a small medical implement used for capillary blood sampling. A blood lancet, sometimes called a lance, is similar to a scalpel style lancet, but with a double-edged blade and a pointed end. It can even be a specialized type of ...
The different cartridge must be smaller in some dimensions than the original design cartridge, and since smaller cartridges are usually cheaper, the device allows less expensive fire practice. Alternative names sometimes imply the type of dimensional difference. A chamber insert may be used for a shorter cartridge of similar base diameter.
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