ineer tube 16.00-20 1.Wear and heat resistance 2. ... -16, 7.50-16, 7.50-20, 8.00-16, 8.30-20, 8.30-22, 8.30-24 ... 750-16, 825-16, 900-16, 900-20, 1000-16, 1000-20, 1100-22LT: 600-14, 600-15, 600 ... 825-16, 825-20, 900-16, 900-20, 1000-20, 1100-20, 1200-20, 1200-24OTR: 1400-38, 1400-20, 1400-24, 1600 ... -24, 1600-25, 17.5-25, 20 ...