White Fiberglass Rods for Whips and Crops.? The rods are made of fiberglass. ? The rods are 4 feet long (48 inches = 121.9 cm).? The rod has a conical form where the thicker the point is the more stiff it will be, but if the point of the whip is thinner it will be even more flexible. ? This feature determines the flexibility of the whip, depending on the length of the whip and the way it is made.? It is only available in white.? Net Weight: 1.9 oz. = 53.9 gr.