50 mL PFA Block Digestion Tube with Closure 210-050-70Designed for block digestion units Thin walled for maximum heat transfer and good visibility of contents 50 mL graduation mark to Class A specifications Includes a threaded polypropylene closure Service temperature range of PFA is 328F to 500F (200C to 260C) other closures sold separately 33 mm PFA Closure 600 033 01 $11. 35 33 mm Transfer Closure, (2) 1 8" Push In Side Ports 600 033 23 $23. 10 33 mm Transfer Closure, (2) 1 8" OD Tube Ports, One Top,