Sigma-Aldrich
PTFE stirrer guides
PTFE syringe tubing
PTFE 注射器管
Quickfit?air/steam inlet tube
Quickfit?ground-glass stoppers
Quickfit?separating funnels
Quickfit?Soxhlet extractor body
Quickfit?three-neck round-bottom flasks with vertical necks
Raschig rings
拉西环
Real Crystal?IR sample cards
Real Crystal?红外样品卡片
Rigid PTFE sleeve
Round-bottom flask
Schlenk reaction and storage tube