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One of the most beautiful mechanisms to have stood the test of time is here in the palm of your hand. Enjoy using Iris to draw and measure single concentric or even shaded circles with its unique moving aperture. Iris is made with utmost care and consideration featuring a solid brass body and carefully selected corrosion-resistant stainless spring steel leaves. The Iris has a metric scale to measure a circle’s diameter. It will measure any circle between 2-70mm in diameter. Iris is made of solid machined brass and carefully selected stainless spring steel. The packaging is made of card and is 100% recyclable. Iris is designed to last a lifetime and the brass will patina with time and use. The leaves are stainless steel and are resistant to corrosion.