AN APERTURE TUBE USED IN A CELL AND PARTICLE COUNTER. THE TUBE IS MADE OF GLASS WITH A RUBY WAFER INSET. THE TUBE FACILITATES THE FORMATION OF A SENSING ZONE WHICH IS USED IN THE COUNTING/SIZING OF THE PARTICLES.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIR)S GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 7017 FOR LABORATORY, HYGIENIC OR PHARMACEUTICAL GLASSWARE, WHETHER OR NOT GRADUATED OR CALIBRATED GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 7017 90 FOR OTHER THAN ELSEWHERE SPECIFIED IN THIS HEADING ALSO CLASSIFIED IN ACCORDANCE WITH NOTE 1(E) TO CHAPTER 90 HARMONISED SYSTEM EXPLANATORY NOTES (HSEN) TO HEADING 70.17