Package includes 4 spacers (2 per side) and 4 longer bolts. Total installation time is less than 3 minutes. Considered "easy" to install on your own. The Allen Key provided with your Travel Buggy is the only tool required. 

PROVIDED AS STANDARD ON NEW CITY 2 PLUS PURCHASES, THIS IS TO REPLACE LOST/BROKEN SPACERS ONLY FOR CITY 2 PLUS