These printers use the 407823 cartridge:

Ricoh MP 501 SPF

Ricoh MP 501 SPFG

Ricoh MP 501 SPFTL

Ricoh MP 601 SPF

Ricoh MP 601 SPFG

Ricoh SP 5300 DN

Ricoh SP 5310 DN

Lanier MP 501 SPF

Lanier MP 601 SPF

Savin MP 501 SPF

Savin MP 601 SPF