Round bottom flasks, four hills, central neck and three hills parallel side, cones normalized, Pyrex glass / Duran - Artiglass

Pyrex/Duran glass flask, ml 250, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 250, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 500, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 500, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 1000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 1000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 2000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 2000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 3000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 3000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 4000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 4000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 5000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 5000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 6000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 6000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 10000, centr. NS 29/32, three sockets lat. parallel NS 29/32

Pyrex/Duran glass flask, ml 10000, centr. NS 29/32, three sockets lat. parallel NS 29/32