Set of stainless steel front brake pistons for Lotus Elite models from 1974 onwards. It is for 2 front brake calipers. The set comprises: 2 pistons 2.250 diameter x 1.130 long and 4 pistons 1.590 diameter x 1.130 long. These pistons are correct for the 3 piston Girling type 17/3HP front brake caliper. Girling seal kit # SP2511 Part #: MA-3500-021