Looks like they are 0.7mm?
(also, note the last sentence)
NCEES POLICY REGARDING THE USE OF MECHANICAL PENCILS - The National Council of Examiners for Engineering and Surveying (NCEES) has adopted a policy which requires all examinees to use the mechanical pencils NCEES provides at the examination site. You cannot use your own personal writing instrument. Examinees must use NCEES-issued mechanical pencils only. These pencils will be distributed at the examination site. The pencil will be pre-loaded with 0.7-mm HB lead. Examinees may NOT bring lead or erasers. If additional lead or an eraser is needed during the examination, raise your hand and a proctor will issue an additional pencil. After the exam you may keep the NCEES pencils.