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You may cut glass plates of up to 20 cm wide, and of any length.
The white measuring plate can be removed, if your TLC plate happens to be too thick to fit (usually when cutting preparative TLC plates).
The side screw fixed onto a turning-knob is for controlling the stop position of the scribbler, so that one can prevent the scribbler from cutting off of the glass plate and chipping off a small piece.
Usually, start from the far side relative to the screw, and cut towards the screw.
The cutter head can be replaced once it has become worn, which an extra spare is included in your purchase. More are available from us.
Return Policy: Have peace of mind in shopping. Whether your purchase of this item is fulfilled by Amazon, or fulfilled by seller, you may return it within 30 days of receipt, as per Amazon policy. --------------------------- Preparative Plates (1000 μm, 20x20cm) also available, please visit our storefront (on a desktop version, click on the “sold by” seller name, and then “storefront”).