Features: * new high quality *Made of high quality material, durable *Silicone tube spout cap Resealable mastic box Spare spout screw cap. *Prevents nozzle clogging and extends sealant shelf life. *These cartridge nozzles have a universal screw connector that fits standard EU3 cartridges. The nozzle contains an extra thread onto which a screw cap can be fitted to keep the cartridge airtight when the cartridge is not in use. *Using the extra screw cap prevents the silicone from hardening in the nozzle and extends the shelf life of the cartridge - no more throwing away half-used tubes! *Use with silicone, sealant, mastic, caulk, and more. 1Screw cap held in place by threaded nozzle. *The airtight cap prevents hardening inside the nozzle. *Nozzles can be cut to size. Specifications: Material: plastic Color: as picture shown size: Length: 10.5cm/4.13in Cover Height: 4.5cm/1.77in Easy to distinguish: the caulk nozzle is white in color and the caulk nozzle cap is red in color. Easy to install with screws, easy to operate and easy to construct. Quantity15set Package Included: 15* caulking nozzles 15* caulk nozzle cap Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data.