TITRONIC® 500 T 500-M2/20 TITRONIC® 500 basic unit with magnetic stirrer TM 235 and 20 ml exchangeable unit WA 20, with brown glass bottle for titrant, GL 45 and S 40-bottle adapter, hoses, drip tube and titration tip suitable accessories: interchangeable unit WA05 5 ml SI Analytics No. 28520305 interchangeable unit WA10 10 ml SI Analytics No. 28520310 interchangeable unit WA20 20 ml SI Analytics No. 28520320 interchangeable unit WA50 50 ml SI Analytics No. 28520350