Burette is subsisting of leak proof stopcock fitted with a self lubricating PTFE plug and with a transparent acrylic body and a. Each Burette is individually calibrated to give maximum accuracy. The pH RANGE OF 1-14 is ideal and can be used up to 5% wt/wt of acids or 30% bases. Acrylic body is unaffected by dilute mineral acids & bases except Hydrofluoric Acid & Ammonium Hydroxide.