Series 368 - Without adjustment ring and without extension cord. Technical features: Precision 12-20 mm: ±2 'm 20-100 mm : ±3 'm 100-300 mm : ± 5’ m Graduations: chrome plated mat drum and scabbard, up to 12 mm: Ø 17 mm drum Starting from 12 mm: Ø drum 23 mm Measuring surface: Steel measuring pin: 1 drum tour equal 0.5 mm Reading: 0.005 mm Measuring method: 3 keys Delivered: In cabinet, key The measuring surfaces and the cone are made of steel. Contact points are in carbide