120SE 0.5-40 ppm 120SF 50-2000 ppm 120U 0.2-6.0 ppm 120SC 0,005-0,16% 120SM 0,05-0,6% 120UH 2-20% 120SB 0.75-300 ppm 120SD 1-60 ppm 120SH 0.1-4.0% 120UT 2-20%