The instrument measures angles in 0

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a rotating cap

External dimensions: C = 22

non‑grooved gripping surfaces

SieviAir R2 Roller S1 str. 42 Size:47 The instrument measures angles in. Sievi AirRacer shoe with BOA closure. The SieviAir sole conducts moisture and heat away from the foot, providing more than 30% better breathability through the ventilation ducts in the side of the sole. Sievis FlexEnergy absorbs the kinetic energy created, providing over 55% return energy. FlexEnergy is the same ultra light and shock absorbing sole material that is used in running shoes.