Refillable breather comes standard with an integrated anti-splash device and ZR gel. Breathers have 3micron filtration and include a spring loaded check valves. 

Newly improved design; new glass-filled nylon standpipe with splash guard to increase durability and chemical compatibility, features check valves that open at 0.05psi which give a 300% improvement in performance

Available in three sizes 93 (300cc of Desiccant), 96 (600cc of Desiccant), 121 (1000cc of Desiccant). 

The TDB comes the following thread pattern options: (1B) 3/4" BSP and (1N) 1" NPT Male thread pattern, (34B) 3/4" BSP and the larger 121 series has the (114B) 1-1/4" NPT option. 

The TDB also comes with the option to have check valves which can allow the breather to last longer in certain lower flow applications (RV) and without check valves (R). 

This breather also has the option for replacing the Desiccant and Filter independently