・ Basically, items are shipped on the same day if payment is received by 12:00, but there may be times when shipping is not possible without notice due to sudden illness or other reasons. In such cases, please request a cancellation. ・ Support information will be provided after purchase if necessary in "Mamushi's Flea Market Discussion." This is a silicone tube used in the piping of De'Longhi fully automatic espresso machines, etc. It is secured with O-rings and horseshoe-shaped fasteners. ★ This 18-19cm size is used to connect the generator to the steam, and it is a place where there are many bends, or perhaps because of the high pressure, but it is a place where water leaks frequently. It is a part that does not break, but many people seem to fail due to deformation or bending during DIY. The method of inserting the silicone tube is as follows: 1) Remove the old O-ring from the insertion side. 2) Taper the tip of the tube with sandpaper. 3) Apply food machinery grease to the tip. 4) Put the O-ring on the tube. 5) Insert it vertically and slowly. 6) Push in the metal part with a 4mm wide flathead screwdriver. 7) Insert the horseshoe-shaped fastener. No force is required at all, and using pliers is out of the question. The following URL explains, including the introduction of tools: https://note.com/mamushi_shop/n/n402c12e336a0