GUM Bi-Direction Proxabrush is a double position brusg to reach the anterior and posterior interdetnal spaces.<br /><br />Availmable in 3 versions:<br />- Ultra Micro - ref 2114 (0,7 mm diameter interdental space).<br />- MicroThin - ref 2314 (0,9 mm diameter interdental space).<br />- Thin - ref 2614 (1,2 mm diameter interdental space).