Bel-Art Polyethylene Buchner Table-Top Funnel with Perforated Removable Plate; 18 in. I.D, 11.5 in. Height (H14627-1457) Rugged and rigid polyethylene construction, ideal for heavy use 8" Rim to plate Fixed or removable perforated filter plate made of 4.8mm thick high density polyethylene (HDPE) with 4.8mm perforations on 11mm centers The fixed version is for coarse filtration or use with a cloth or paper filter A removable filter plate is available for use in precious metals recovery; use from -80C (-112F) to 52C (125F)