Kreitler Rollers Frames designed for use with Kreitler drums.Kompact frame is designed for use with 3 or 2.25" Kreitler drums and fits 38" to 42" wheelbasesLower profile frame design, for easier starts and stopsKompact frame folds flat, sits lower to the ground and is lighter than the Universal frameFrames have a lifetime warranty against defectsRoller drums to be purchased separatelyPurchase each component individually to make a set of rollersAll products are made in the USA