Optional 36-1/4” long, neoprene material outer sheath fits ALL motors, EXCEPT for discontinued models listed below. Neoprene sheathing is more flexible than our standard sheathing material. EXCEPTIONS - Cannot Be Used on these Motors: Discontinued EE, GG and MMG Discontinued F, JJ and JB Discontinued 975, 980W and 981W Use with S-93 key tip inner shafts, sold separately.