1KB DNA Ladder is a premixed, ready-to-load molecular weight marker containing eight linear double-stranded DNA fragments. The DNA Ladder is suitable for use as molecular weight standards for agarose gel electrophoresis. The DNA Ladder contains 1.0 -10.0 kb DNA fragments. The 4.0kb band (100 ng/5 μl) has doubled intensity than other bands to serve as reference band. https://molecular-tools.creative-enzymes.com/1kb-dna-ladder-i-item-236.html