This capacitor kit contains 10 pieces each of 30 values ranging from 2pf to 0.1µF.
Capacitors below 100pF are simply labelled with two digits.
Capacitors 100pF and above have three digits. The first two are the coefficient and the third is the exponent.
Example: 683 is 68 x 103 or 68 x 1000 or 68,000pF (also known as 68nF or 0.068µF)