Aluminium espresso pot seals	Outside diameter	Inside diameter	Thickness
1 cup	50mm	38mm	3mm
3 cup	65mm	50mm	3mm
6 cup	70mm	54mm	3mm
9 cup	80mm	63mm	3mm
12 cup	90mm	76mm	3mm
14 cup	93mm	76mm	3mm
18 cup	90mm	76mm	3mm
All measurements are approximate; dimnesions are shown in mm.