I love their racks! I have one for my BPs and it's great. The heat tape (I'm not sure if it's 3 or 4") is recessed into the shelf. I got the belly heat option. The heat cable stuff I've never used, but from what I understand, that's what they used to always use, and have fairly recently (last year or two) started offering heat tape instead of just heat cable. When I ordered mine I don't think the heat tape option was available on the website, but all you have to do is call and place your order and they can do it for you.

Over all they had great customer service, and I love the rack I have! ^_^