QWORK Balance Scale, 200g / 0.2g, Laboratory Triple Beam Balance Beam Scale for Teaching Tool bee - Adjustable span ring fits

- Adjustable span ring fits easily on your fingers

Then use socket screwdriver to screw old nozzle extruder out

Each valve is tested by air tightness

DTerm Series E

QWORK Balance Scale, 200g / 0.2g, Laboratory Triple Beam Balance Beam Scale for Teaching Tool bee - Adjustable span ring fitsQWORK Balance Scale, 200g 0. 2g, Laboratory Triple Beam Balance Beam Scale for Teaching Tool Product Features 100% brand new and high quality, good performance and long term service. Achieve precision weight measurement based on lever principle. Use the tweezer to clamp the weights, keep them clean and accurate. Perfect for scholastic physics and chemical experiments,also can be used as Lab scale, Jewelry scale. Enjoy a smooth &worry free return