Default inside diameter is 14mm, and the thickness is 1-2mm.
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A - twist series
is aiming to reflect the contrast between the complexity and simplicity of design by using a simple twist design gesture. This series blends the hard edges within the soft envelope, which is the rebel from everyday life.
A- twist series is designed by CRG Design, which based in London and Amsterdam.
CRG Design founded by a group of passionate young designers who focus on new technology and intertwined complex nature.