GTZ comes in two types. 3/4 and 7/8. You can check it on the GTZ housing.

For 3/4 repair kit replacement numberAUTOFREN D1385

For 7/8 original repair kit numberNISSAN 46011W1326
ReplacementRocky R46011F5025 for the seal and piston


Example for 3/4

There are only 4 seals in the set.

Different from original ones, but it works.

Assembly order of the piston

Inside should not have rust or dirt, but avoid scratching the cylinder surface