Limit switch(foot switch,limited switch)(SA-003) strong structure,made of Zinc metal alloy and plastics ... size,water and o Limit switch(foot switch,limited switch)(SA-003)Characteristics:double way switchstrong structure,made of Zinc metal ... plasticssmall size,water and oil resistantdouble spring inner switch,longer machine lifebigger OT actioneasy to contact linemany kinds of leading-to ...