This Burette has a transparent acrylic body and a leakproof stopcock made fitted with a self lubricating PTFE plug. Each Burette is individually calibratedto give maximum accuracy. Acrylic body is unaffected by dilute mineralacids & bases except Hydrofloric Acid & Ammonium Hydroxide. The pH rangeof 1-14 is ideal and can be used up to 5% wt/wt of acids or 30 % bases.