This foam lubricant spreader (a.k.a. sponge) is specifically designed for spreading lubricant in duct prior to fiber optic cable blowing/jetting. It comes standard as part of the duct packs for 2" duct, and it may be purchased separately here. The line carrier is specifically designed to ensure the efficient and safe application of lubricant to the walls of the duct, reducing the chance of fiber optic cable damage.