Joints

A slip joint is used to join two pieces of guttering with a seam, can allow for some expansion and contraction, available in 5” white only. 
  Slip Joint
An expansion joint is used to join two pieces of guttering too long to be seamless due to expansion and contraction.  The expansion joint is aluminum in color with a rubberized 3” center section to allow for expansion and contraction of the guttering in varying weather conditions, available for 5” or 6” guttering.
Expansion Joint