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beaker: glass or plastic; common sizes are 50 ml, 100 ml, 250 ml, 400 ml; glass beakers may be heated. . buret: glass: common sizes are 25 mL, and 50 mL: used to measure volumes od solutions in titrations . ceramic square: used under hot apparatus or glassware . clamps: the following types of clamps may be fastened to support apparatus: buret/test tube clamp, clamp holder, double buret clamp, ring clamp, 3-pronged jaw clamp . clay triangle: wire frame with porcelain supports, used to support a crucible . condenser: glass; used in distillation procedures . crucible and cover: porcelain; used to heat small amounts of solid substances at high temperatures . crucible tongs: iron or nickel; used to pick up and hold small items .
