These two replacement O-rings are the correct size and specification Viton O-rings for the standard Rover injector used on the Rover SPi Minis (Bosch 0280150682, this injector is NLA). The same injector was fitted to Cooper and non-Cooper models. These are also suitable for Rover Metro/100 SPi injectors (Bosch 0280150683 & 0280150657 etc. also NLA).
The factory fitted injector seals degrade getting brittle and cause leaks or fuel pressure issues over time and often snap when removed. The listing shows how remove and replace the seals, just for your information.
Pictures in the listing show other parts for the buyers information only, the injector pictured is not part of the sale, the sale is for the a pair of o-ring seals only.