. Made of , durable and practical to use. Delicate and exquisite, highly matches the original equipment. Has higher heat resistance and stretchability, and is easier to install. Solid and durable, long service life. Without this sealing ring, the nozzle of the steam cleaner will cause the phenomenon of back spray steam when in use, which is likely to cause burns. So when you find that the sealing ring is aging and damaged, please replace it in time. Replacement O-ring set for replacement of O-rings for diverse steam cleaner accessories. Including safety lock, detail nozzle, extension, steam hose and iron connection. Useful spare part set for uninterrupted use. Heavy duty O-rings for pressure washers and steam cleaners. Fits behind the nozzle, on the lance and HP hose (that screws onto the machine) on all HD and HDS machines. Also fits K2, K3, K4, K5, K6, K7 models. Number: 2.640-729.0 Color: as shown Material: Plastic Package Contents: 1 set x Seal ring (20 pcs) Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.