4.5 mm ~0.177" Skateboard bearings (non-standard). 5 mm ~3/16" (4.762 mm) Standard industrial bearings. Material Excellence: Manufactured from corrosion-resistant A2 304 Stainless Steel for outstanding performance in damp or harsh conditions.
Aluminium Alloy Bike Headset Spacers 12-Pack, 2mm 3mm 5mm 10mm Stem Washers for 28.6mm Fork, Black Bicycle Front Fork Gasket Kit
Zilimontt Aluminum Alloy Headset Spacer Set – 0.3mm / 1mm / 2mm / 3mm Fine-Tuning Washers for Fork Steerer Tube Adjustment, 29mm ID × 34mm OD, Silver, 1 Pack(1mm)
Yphzmtz Pack of 15 Headset Spacers for Bicycle, 7 Sizes Carbon Fibre Road Bike Stem Spacer Rings Bicycle Fork Spacers Kit 1mm/2mm/3mm/5mm/10mm/15mm/20mm
Axorafow 12-pack Aluminum Alloy Headset Spacers for 28.6mm Fork – 2mm 3mm 5mm 10mm Stackable Stem Washers for Road/mountain For Bike Frame Height Adjustment
Aluminum Headset Spacers Set For Bicycle 28.6mm Steerer Tube Black Adjustable 2mm 3mm 5mm 10mm Multiple Sizes Alloy Easy Installation For Mountain Road Bikes Pack Of 6
Bicycle Headset Spacer Pack for 28.6mm Fork Steerer Tubes Featuring 2mm 3mm 5mm and 10mm Aluminum Alloy Spacers