GRAVITY COLUMNS Gravity column manufactured from medium wall tubing with PTFE stopcock. Similar in design to the 420510 series Glass frit (40-60 micron porosity) at the lower end to act as a support for column packing material May be used alone or in combination with 420570 series reservoir and 420575 series flow control adapters Custom sizes and plastic safety coating are available upon request 420650-0560 has a 50/30 Spherical joint 420561-0430 has a Rodaviss 24/40 Standard Taper joint (threaded in top) Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements Column ID (mm) : 75 Column Length (mm) : 200 Nominal Volume (mL) : 883 Standard Taper Joints: Upper : 45/50 Stopcock Bore Size (mm) : 4 Case Qty : 1