The Andis 21688 size 3 attachment comb adds a 3/8-inch guide length to a compatible detachable-blade clipper setup. It is a snap-on accessory for barbers and stylists who want to control cutting length while using the clipper they already own. Its black polymer construction provides a comb guide over the blade, and the individual format makes it useful for replacing a missing size 3 comb.

Blade selection is essential: Andis specifies that this attachment fits a size 000 blade only. Check the fitted blade as well as the clipper model before use. The verified model list includes BG, BGC-2, BGR+, BGRC, BGRV, BGCL and MBG-2. Match the exact model suffix when ordering a replacement, particularly if several Andis clippers share your workstation.