Wahl Color-Coded Clipper Guide [#1 1/2] - 3/16" #3139-101 The #1 1/2 Cutting Guide comes in Off White (3139-101) and measures at a cutting length of 3/16". The Wahl Professional Cutting Guides fit all full-size Wahl Professional blades excluding the Competition Series and 5-in-1 Magic Blades.