The TX-RS35 kit stocks the radial lip seals a gearbox or bearing housing rebuild actually needs: nitrile and fluoroelastomer lips, garter-spring loaded, bonded to steel cases that press into the bore and stay there. The lip geometry pumps oil back toward the sump while it runs, which is the quiet difference between a seal that seeps and one that seals.
Dust-lip variants add a second unsprung lip against contamination — the default choice in dirty environments. Fluoroelastomer versions hold their edge at temperatures and shaft speeds that cook nitrile.
Each kit covers a shaft-size family with the common metric sections, plus a fitting sleeve and a card of installation depths — the details that decide seal life at the moment of assembly.
