Need to know Icons

We use SVGs for these icons. They are included individually as background images. They won't show up in any browser that doesn't support background-size.

work-volunteer-ntk
health-ntk
phone-code-ntk
language-ntk
insurance-ntk
toilets-ntk
female-ntk
time-zone-ntk
danger-ntk
elevation-ntk
area-code-ntk
bicycle-ntk
male-ntk
cable-car-ntk
embassy-ntk
visa-ntk
boat-ntk
checklist-ntk
sf-cable-car-ntk
electricity-ntk
gay-lesbian-ntk
hitchiking-ntk
tram-ntk
legal-ntk
train-ntk
car-ntk
driving-ntk
bus-ntk
time-ntk
air-ntk
motorbike-ntk
disabilities-ntk
kids-ntk
currency-ntk