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H-8575 Test Tube (Semi-Micro). Self-closing, round jaw, plain brass wire Jaw Construction. To 3/4" (19mm) Jaw Opening, 5" (127mm) Length, H-8580 Test Tube (Stoddard). Self-closing, rectangular jaw, plain brass wire Jaw Construction. To 1" (25mm) Jaw Opening, 5" (127mm) Length
