・ Basically, items are shipped on the same day if payment is received by 12:00 PM, but items dropped in a post box will be processed by 9:00 AM on Saturdays, Sundays, and holidays. ・ Support information will be provided after purchase if necessary in "Mamushi's Flea Market Discussion". This product is a set of 16 O-rings (H) 1 piece, (D) 2 pieces, (C) 2 pieces, (B) 7 pieces, and (A) 4 pieces, which are used to disassemble the generator of the ESAM1000 series and connect its internal and external parts. The parts of the generator are described with the following designations: The generator consists of a boiler and an extraction device. The extraction device is divided into an inner cylinder and an outer cylinder. Inside the inner cylinder are two rods: an injection rod and a discharge rod. The protruding rod of the inner cylinder is the injection rod, which uses two O-rings (B 2 pieces). The discharge rod of the outer cylinder uses O-rings (D 2 pieces) and (B 1 piece). (Trivia: If this discharge rod is black with coffee oil, it will greatly affect the taste, so clean it carefully with an ultra-fine brush. I also sell brushes.) (Trivia: Applying grease is the standard method for inserting the rod because there is resistance.) The tube and boot connecting the boiler and the extraction device have O-rings (C 2 pieces) on the inner cylinder side connector, (A 2 pieces) on both ends of the tube, and (B 2 pieces) on the boiler side boot. The boiler inlet boot has O-rings (B 2 pieces), and the tube has (A 1 piece), and the steam outlet tube from the extraction device has (A 1 piece). (Trivia: The O-rings on the boot are located at both ends. If you put them in the middle groove, it will definitely leak water.) Finally, the extraction ring (H 1 piece).