Locus-specific and allelic ladder information for Promega DNA-typing systems can be found in the relevant Technical Manual:

PowerPlex^® System 16 Technical Manual #TMD012
PowerPlex^® 16 BIO System Technical Manual #TMD016
PowerPlex^® Y System Technical Manual #TMD018
PowerPlex^® ES System Technical Manual #TMD017
PowerPlex^® 2.1 System Technical Manual #TMD011
PowerPlex^® 1.1 System Technical Manual #TMD008
PowerPlex^® 1.2 System Technical Manual #TMD009
GenePrint^® Fluorescent STR Systems Technical Manual #TMD006
GenePrint^® Silver STR Systems Technical Manual #TMD004