Gooch Crucibles With Sintered Disc Porosity G1 To G4 Gooch Crucibles With Sintered Disc And Cone Porosity G1 To G4 Buchner Filter Funnels With Sintered Disc G1 To G4 Buchner Filters With Sintered Disc G1-G4 With Cone Joint Gas Filtering Tubes Double Drawn Pipeline Filter With Sintered Disc Porosity G1-G4 Micro Filter Assembly – Vacuum Filter Holder With Graduated Cup, Sintered Base With Ground Join, Clamp And Cone Flask