The tubes are of plastic, which prevent from being bending. It can be applied in a wide range of applcations, from the construction to the industrial sectors, serving as the tool for door and window installation, or for daily maintainence, for repairing floor tiles, gaps, etc.Features- Color: White.-Material: Plastic.-Size: Approx. 10.5 x 1.7 x 1.7 cm.- plastic prevents bending, durable and no smell.- Wide range of applications: Can be applied in the construction and industrial sectors.- Applicable to the replacement of the caulk when it can not be extruded after coagulation.- Universal standard threaded base, widely used in caulk tips replacement.- 20 pieces in a sets, Adequate caulking replacement.- Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item.