Macherey Nagel EC (Standard end fitting) columns use CC (ChromCart) Guard columns. Use guard holder 4AJ-7081898 (MN PN 721359) and a column coupler to use with CC (ChromCart) Guard columns. EC 250/4.6 NUCLEOSIL 500-7 C18, 250X4.6mm
POA means "Price On Application". Items displaying POA instead of the sell price do so for a number of reasons, not least because we anticipate some additional information is required in order to supply the most suitable options/configuration to each individual customer.