this pair of 1mm spacers provides an easy solution to assembling the sanwa srg-hr into an eclipse 2 kit. it provides multiple useful functions; - m3 nuts can be placed into the spacer and held in place easily during assembly with no need for a nut runner / spanner to secure. - because of this servo can be placed centrally far easier using only a hex driver. - raising the servo up to ensure all common servo savers dont protrude underside of the chassis.