Seawolf flotation jacket and life jacket. ● Cherry blossom mark, Type A Internationally approved inflation system installation Material: 100% polyester; Size: One size fits all (waist belt can be adjusted from approx. 21.7 - 55.1 inches (55 - 140 cm)); Buoyancy over 24 hours, uses 0.6 oz (9 kg) of buoyancy; Uses 0.6 oz (18 g) cylinder; Approved small marine life jacket TYPE-A No. 55534; Note: The color may differ from the actual product depending on your monitor settings. Manufactured in South Korea (Korean headquarters factory) inspection and packaging in Japan. The black cartridge has an estimate of the replacement date on the main unit. If the replacement date is over the day, the inflator may not work properly. Please purchase the dedicated cylinder and cartridge (model number SW-1800) separately. If you purchase multiple items, there may be several months differences due to different production months depending on stock and color. Thank you for your understanding. Gas cylinder is not used, unless the product is used. The used gas cylinder will have a hole. Never use any used item. Please purchase the dedicated cylinder and cartridge separately for replacement. ※This product cannot be returned for any reasons. Please make sure you place the order. ※※※