GW1.01 Burette with pinch cock
GW1.02 Burette with straight bore glass key stopcock
GW1.03 Burette with screw type PTFE needle valve stopcock
GW1.04 Burette with straight Bore PTFE key stopcock
GW1.05 Burette three way bore screw type PTFE needle valve stopcock
GW1.06 Burette with straight bore glass key stopcock
GW1.07 Burette double oblique Bore PTFE stopcock 3 way
GW1.08 Burette over flow cup, automatic zero, double oblique Bore PTFE key stopcock 3 way
GW1.09 Burette automatic zero glasskey stopcock mounted on reservoir with rubber Bellow