Each injector includes all 3 seal rings necessary - 6 Required.
Sold in increments of 1 each and also available as a complete set of all 6 injectors, with free shipping included, see below.
These are OEM Marelli injectors, identical as those sold at a VW dealer.
(Bosch has never manufactured an injector for the 12V engine.... Only for the I-5 and 24V engines.)