Should be suitable for ALL unit 350 and 441 BSA, and B25 through 1970.  OEM part #'s 68-0597 / 70-8259 / 70-8132, depending on your parts book.  X-rings to replace the nearly always leaky o-rings BSA used at the oil pipe junction under the engine.  Doubling the surface sealing area, the rings work really well.  An alternate size also available for unit twin, check the store.

I will answer questions promptly, good luck and thanks for looking.

Buyers please note:  If you're buying multiple items (and lots of folks do), then when you're finished, please either 'Request Total from Seller' (me) or just wait for an invoice.  Ebay's shipping calculator is terrible and I ALWAYS combine shipping when possible for the cheapest cost to you.

Thanks for the help.

Joe