Secondary Mathematics Lab Kit

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Plastic Strip (A Type)
Transparent Perspex 264 x 20 x 2.7 mm to 3 mm having 3 slots of width 5 mm. at a distance of 0 to 30 mm. next 50 to200 mm. and again 220 to 250mm. numbering on 0 to 25cm. with mm. both side, all marking and numbering with center line in black colours.