PCR (POLYMERASE CHAIN REACTION) TUBES AND MULTIWELL PLATES, USED IN THERMAL CYCLERS. THESE CYCLERS APPLY HOT AND COLD CYCLES TO TUBE/PLATES CONTENTS OVER VERY SHORT TIME SPANS, TYPICALLY 30 SECONDS AT TEMPERATURES FROM 0 TO 99 DEGREES CENTIGRADE. THIS RESULTS IN THE REPLICATION OF MOLECULAR BIOLOGICAL SAMPLES TO CREATE A USABLE QUANTITY FOR SUBSEQUENT RESEARCH. AN EXAMPLE OF THEIR USE WOULD BE DNA FINGERPRINTING. MADE OF PRECISION INJECTION MOULDED RESEARCH GRADE POLYPROPYLENE, TO FEATURE EXTREMELY UNIFORM WALL THICKNESSES. THE WALLS ARE REQUIRED TO BE OPTIMALLY THIN IN ORDER TO EVENLY DISTRIBUTE HEAT APPLIED TO THEM. AS PARTS

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING GENERAL INTERPRETIVE RULES (GIR)S: GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 8419 GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 8419 90 FOR PARTS ALSO CLASSIFIED IN ACCORDANCE WITH:- NOTE 2(B) TI SECTION XVI HARMONISED SYSTEM EXPLANATORY NOTES (HSEN) TO HEADING 84.19