Don't know...I should've been more specific and said WHEN they don't fit. Pacesetter purposely molds whatever they make so it doesn't fit without modification, I don't care if the GB was for $10, if I had known it had anything to do with a Pacesetter design I would've laughed and kept browsing. If by any luck they fit without modifcation, which is HIGHLY unlikely, then I'll keep them. But we all know they will not which is why DNA will be getting them shipped right back in an opened box. Or better yet, I'll refuse delivery and UPS can ship it back after a certain amount of attempts...There's an idea!![]()