Can be used on non-Falk horizontal covers; Substitute for ABB Dodge Grid-Lign 006812, Martin Blue-Flex 1090M10-SEAL, Altra TB Wood's G-Flex 1090T10PKT, Timken Lovejoy 69790405183; Five-year warranty. We're so confident in the performance of Falk Steelflex Couplings that they are warranted for 5 years when lubricated with Falk LTG Grease and used with Falk brand hubs and grids. Most competitors only offer a 12- or 18-month warranty