|Test-tube cap covers test-tubes up to 15cm/6 inches tall to allow measurements while the sample compartment lid is open. Allows for flexibility between samples.|
|One cap to cover a tall test tube.|
|Measuerments in 6" tall test-tubes, especially in coal mining and agricultural applications.|
|GENESYS 30 Visible Spectrophotometer|
|Requires 840-277500 Test-Tube Holder|
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