Ready-to-use Quantitative Highly Stable Precise Ten discrete fragments ranging from 300 bp to 5000 bp The Norgen MidRanger 1 kb DNA Ladder is prepared to ensure quality and batch-to-batch consistency. Our MidRanger contains ten discrete fragments ranging from 300 bp to 5000 bp. This Ladder is ideal for sizing larger PCR products (>1kb) and most cloning applications. Contents: 1mL of premixed DNA ladder (0.5µg/10µL) in loading buffer (10mM EDTA, 10% glycerol, 0.015% bromophenol blue, and 0.17% SDS) .