I have the white one pictured on the Amazon site for my Viking Quilt Designer and the pictured acrylic one for my Viking serger. I love them both and they do help your back. I have one of the FW tables for my FW so didn't get the one for a FW. When I go to a class/club, I use the door stops. I recommend anyone with back troubles to get one. I got them at sew expos - one in AZ and one in Puyallup, WA - from the same company that goes to the sew expos.