The SM 100pb DNA Ladder is a standard size marker equivalent to the Fisher’s O'RangeRuler‱ 100 pb DNA Ladder (#SM0623). The SM 100pb Ladder allows to determine the size of double-stranded DNA fragments between 100 bp and 1500 bp and it is composed of 15 double-stranded DNA fragments of 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400 and 1500 bp. Like the O'RangeRuler 100 bp, the SM 100 bp gives more intense bands at 500, 1000 and 1500 bp. At the end, the SM 100 pb DNA Ladder is 25 times cheaper than the O'RangeRuler 100 pb.