Outer Chainring Spacers.(Middle/Outer - with 10mm hole)Precision CNC machined alloy spacers.Perfect for minor chain alignment adjustments, or re-spacing gaps, or allowing clearance for chainguards etc.Range provides pretty much everything you might need.Silver anodised... bagged in 10s for dealers.(RRP is shown each)0.6mm1.2mm2.0mm 3.5mm