356-34-142 Small O-Ring at Rear Wheel Bearing for 356. 2 required per car.

For Pre-A thru 356C -- This o-ring is used in the rear axle in all 356 models. See diagram below, #14. This is not just a simple o-ring but a specially formed rubber gasket. You need 2 per car.

Note: This o-ring is also in our Rear Axle Seal Kits: NLA 34 411 & NLA 34 402