GeneRuler DNA Ladders are suitable for sizing of PCR products or other double-stranded DNA fragments in agarose and polyacrylamide gels. Range: 14 fragments (in bp): 10000, 8000, 6000, 5000, 4000, 3500, 3000, 2500, 2000, 1500, 1000, 750, 500, 250