... 1.Size: 14mm,16mm,18mm,19mm,20mm,24mm,28mm,30mm,32mm,38mm,40mm,42mm... 2.Material: Aluminium 3.Process: Logo engraved ... aluminium cap31.4mm aluminium cap31.7mm aluminium cap32mm aluminium cap32.32mm aluminium capInner Diameter:30mm31.4mmmm31.7mm32mm32.32mmHeight:13.5mm13.1mm13 ...