层析仪配件（250ml漏斗）

层析仪配件（250ml漏斗）， 用于大体积上样或添加缓冲液， Pkg of 5, 250 ml, funnels for packing columns, works with Econo-Column chromatography (up to 2.5 cm ID), Poly-Prep and Econo-Pac columns