Providing stability, confidence, and increased accessibility, the Speedball Boss Ribs are great companions for centering and shaping clay on the wheel from beginners to pros. 
Kit Includes:

(1) 4″ x 3.5″ Boss Rib with strap loops
(1) 4″ x 2.75″ Boss Rib with strap loops
(1) 4″ x 2.75″ Boss Rib
(1) 4″ x 1.25″ Boss Rib
(2) 1″ x 12″ Straps