Quikrete 692202 Quik-Tube Concrete Forming Tube, 10" Diameter, 4' LengthThe QUIK TUBE Building Form is a ridged fiber building form tube that eliminates the need to build wood forms. Engineered from multiple layers of high quality fiber laminated with an adhesive, with a special coating which resists moisture and facilitates even curing. Diameter: 10" Length: 4' The QUIK TUBE Building Form is a ridged fiber building form tube that eliminates the need to build wood forms Engineered from multiple layers of high quality