Shimano SP41 Derailleur Housing Box 4mm x 50m, Black

A 50-meter roll of 4mm shift derailleur housing for Shimano mechanical drivetrains, the Shimano OT-SP41 Derailleur Housing in black is the bulk-roll source for shop and DIY builds. The SP41 housing uses stiff stainless linear reinforcements that resist compression and a silicone-grease-prelubricated inner liner that reduces friction between cable and housing, which is what gives Shimano mechanical shifting its precise lever feel. At 50 meters per box, the OT-SP41 covers many full cable replacements and is the right pick for any shop, fleet, or home mechanic running multiple Shimano mechanical road or MTB drivetrains.