Replacement O-rings for five-position NMR tube cleaner system

DuraSeal^TM laboratory stretch film

Microcapillary tube Drummond Microcaps^®

Drummond Microcaps微量毛细管^®

Ace auto-zero McLeod vacuum gauges

Ace flat-bottom reaction flasks

ACE heavy-wall powder funnels

Ace round-bottom flask with threaded side-arm

Aldrich^® can/drum adapters

Aldrich^® corrosive lecture-bottle gas regulator

Aldrich^® non-corrosive lecture-bottle gas regulator

Aldrich^® System 45^TM powder addition funnel