If you have any concerns regarding the E61 Mushroom O-Ring features, abilities, or fit please contact consumer service here or pop into our live chat feature to your lower right. This item is eligible for a return unused within 30-days of the shipping date. To make a return contact us via the contact us page for an RMA#. If an RMA# is not present on the outside of the box, no credit will be issued. Full Shipping Policies & Full Returns & Refund Policy
A replacement o-ring for an E61 mushroom group. This o-ring belongs at the bottom of the mushroom and seats in that notch.