This is a rear brake caliper unit for 1989 Jaguar XJ40/XJ6. NOS part with no box, original Girling /Jaguar, not sur eif left or right rear , may be interchangeable and left /right is based on carrier carriage which is not here, only caliper unit, this part has been inside for 15 years, so may be gummy, but it is NOS and hard to find these days, thanks for looking FREE SHIPPING LOWER 48 USA WILL SHIP ANYWHERE IF BUYER PAYS COSTS, NO RETURNS PLEASE