3 pcs. used in K110, K111*, K112 - primary pulley speed (NIN), secondary pulley speed (NOUT), turbine speed (NT) 2 pcs. used in K410 - secondary pulley speed (NOUT), turbine speed (NT) 1 pce. used in K210, K310, K311, K311F, K312, K411, K41A, K41B - secondary pulley speed (NOUT)
*we also found OE information that some K111 may use only 1 of these for secondary pulley speed (NOUT) and for primaray pulley speed (NIN) and turbine speed (NT) these would use speed sensor O-SPS-KXX-2 which should have has a green paint mark. Please make sure to use the correct speed sensors - more info my be found on our "IDS-Toyota-CVT-Speed Sensors"
supplied with o-ring - the o-ring is also available as single part: A-ORG-121696