The Korkers I-Drain sock come in 2 different thicknesses, 2.5mm and 3.5mm. The 2.5mm sock is grey without a grave guard and the 3.5mm sock is black with a gravel guard.
The Korkers I-Drain sock come in 2 different thicknesses, 2.5mm and 3.5mm. The 2.5mm sock is grey without a grave guard and the 3.5mm sock is black with a gravel guard.