Welch Materials HPLC Guard Column Cartridge Boltimate EXT- C18, 4 x 5 mm, 2 pc/PAK

Welch Boltimate is a core-shell material with a 1.7 μm diameter non-porous solid core, and a 0.5 μm porous outer shell. Boltimate can deliver speed and efficiency rivaling UHPLC, using conventional HPLC systems at much lower back pressure.