1502 Series 4mm ID Spacer (6mm OD, 27mm Length) - 4 Pack

27mm length spacers shine when used with 1121 Series Low-Side U-Channel.  If you pair two channels together with the flanges toward one-another and space them apart with these 27mm spacers, it will yield an overall width of 32mm between the outer walls of the channel, keeping your build on the grid-pattern.  Boxing channel is popular for the sides of a chassis where you want to encapsulate the drive-system within the framework.