I have a set of hipshot ultralites for a 5 string bass. These are 1/2 Clover type. I just replaced them on my Xotic Jazz, http://alembicguitars.net/club/messages/449/149627.html?1361331544 (http://alembicguitars.net/club/messages/449/149627.html?1361331544%20target=_top)
http://store.hipshotproducts.com/cart.php?m=product_detail&p=111 (http://store.hipshotproducts.com/cart.php?m=product_detail&p=111)
Dimentions 1/2 .618
also available Hipshot Type A 5 string bass bridge chrome.