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U.S. Notes (con.) (40) Heat exchanger units, designed for use as part of a heat exchange system weighing more than 63.5 metric tons and not designed to operate with chilled MCB Coolers using propylene refrigerant (described in statistical reporting number 8419.50.5000) (41) Heat exchanger units, designed for use individually or as part of a system weighing more than 63.5 metric tons and not designed to operate with chilled MCB coolers using propylene refrigerant (described in statistical reporting number 8419.50.5000) (42) Heat exchangers, each valued not over $17,000 (described in statistical reporting number 8419.50.5000) (43) Industrial tubular heat exchange units (described in statistical reporting number 8419.50.5000) (44) Heat exchanger plates, cores, finned tubes, cones, shells, bonnets, flanges and baffles (described in statistical reporting number 8419.90.3000) (45) Calendering machines other than for metals or glass, such machines each weighing more than 12,000 kg (described in statistical reporting number 8420.10.9040) (46) Thermal roll laminators, each valued not over $450 (described in statistical reporting number 8420.10.9040) (47) Cutting pads, platforms, base plates, pads, shims, trays, which function as guides for hand-operated table-top calendering machines of a width not exceeding 51 cm (described in statistical reporting number 8420.99.9000) (48) Glass water filtration pitchers and filters (described in statistical reporting number 8421.21.0000) (49) Household alkaline water ionizer and filtration apparatus (described in statistical reporting number 8421.21.0000) (50) Household water filter cartridges (described in statistical reporting number 8421.21.0000) (51) Ionization filters valued over $35 but not over $45 each (described in statistical reporting number 8421.21.0000) (52) Water filters for pet water fountains (described in statistical reporting number 8421.21.0000) (53) Accumulators for heat pumps and air conditioners, valued over $8 but not over $12 each (described in statistical reporting number 8421.29.0065) (54) Basket, Y-type or duplex strainers, each having a threaded or flanged-style end (described in statistical reporting number 8421.29.0065) (55) Cage-type cartridges, designed to remove water directly from fuel tanks, valued not over $2 each (described in statistical reporting number 8421.29.0065) (56) Filtering or purifying machinery valued over $2,500,000 (described in statistical reporting number 8421.29.0065) (57) Hydraulic fluid filters, rated at less than 100 kPa, measuring no more than 10 cm in diameter and 12 cm in length, each valued not more than $2 (described in statistical reporting number 8421.29.0065) (58) Filtration or purifying machinery for liquid chemical polymers, of steel housing, with sintered metal cylindrical filters (described in statistical reporting number 8421.29.0065) (59) Receiver-driers for air conditioning units used in commercial vehicles (described in statistical reporting number 8421.29.0065) (60) Stainless steel mesh filters with plastic cores, of a kind used for preventing clogs in paint sprayers, each valued not over $1.50 (described in statistical reporting number 8421.29.0065) (61) Disposable plastic filters of a kind suitable for filtering and dehumidifying a patient's breath in a medical device such as a gas analyzer (described in statistical reporting number 8421.39.8090) (62) Fiberglass-reinforced polyethylene pressure vessels (described in statistical reporting number 8421.99.0040) (63) Parts of filters, each valued not over $8 (described in statistical reporting number 8421.99.0040) (64) Parts of swimming pool vacuum cleaners (described in statistical reporting number 8421.99.0040) Harmonized Tariff Schedule of the United States Revision 15 (2026) Annotated for Statistical Reporting Purposes XXII 99 - III - 144