This Rising Dragon Jet Internal with single pulse is has been discontinued from the manufacturer but a few of these turned up, so we some of these snap-in style jets left.

The pulsating version of this jet is no longer available.  You can use the direction jet RD201-3711S .

You can also used RD suggested jet: Rising Dragon suggests replacing this jet with the directional jet that is still available and will fit this jet body: See RD201-3711S

This RD201-3411S is a 3 inch diameter jet,

Quantum Single Pulse 3 Inch Stainless Escutcheon Original Version of Quantum 3 Inch Single Pulse Snaps into Rising Dragon Jet Body Lock Ring Sold Separately.