Quantity selectable depending on the variant, 32 x 4mm VMQ/FDA (red) piston seal Our materials consist exclusively of VMQ or EPDM with FDA/KTW/KTW 1.3.13 approval. VMQ = methyl vinyl rubber / silicone [red] Designation: Silopren EPDM = Ethylene Propylene Diene Rubber [Black] Designation: Keltan FDA = Food and Drug Administration Approval for the food sector For the following models [Saeco], please be sure to compare the size of the O-ring of your brewing group with the seal shown here, as both sizes (38-4mm or 32-4mm) were installed on these Saeco devices and this only visually matches the Have the O-ring of your brew group checked. We stand for fair online trading! For this reason we are: Brand names are all protected, but are only used here to describe the product to.