One pair (two pieces) of silicone o-rings sealing gasket, fit our stainless steel, PTFE and nylon grinding jars.

50
OD: 54mm ID: 50.5mm Thickness: 3.5mm
100
OD: 62mm ID: 58.5mm Thickness: 3.5mm
250
OD: 85mm ID: 81.5mm Thickness: 3.5mm
500
OD: 100mm ID: 106.5mm Thickness: 3.5mm