It includes:
The [UltraSPARC I]? used noticeably from 143 to 200 Mhz in the Ultra 1 and Ultra 2 computers manufactured by Sun Microsystems
The [UltraSPARC II]? used noticeably from 250 to 480 Mhz in various computers manufactured by Sun Microsystems
The [UltraSPARC III]? used noticeably from 700 Mhz upward in various computers manufactured by Sun Microsystems
Also, variants of the above processors exist (such as the IIi or the IIe).