Ground Glass Flask Stoppers

Ground Glass Flask Stoppers, clear, joint: No. 13

Ground Glass Flask Stoppers, clear, joint: No. 16

Ground Glass Flask Stoppers, clear, joint: No. 19

Ground Glass Flask Stoppers, clear, joint: No. 22

Ground Glass Flask Stoppers, clear, joint: No. 27

Ground Glass Flask Stoppers, clear, joint: No. 9