locks. Sec. 11979.  Stainless steel hose kits. Sec. 11980.  Stainless steel hoses. Sec. 11981.  Wrist watch strap buckles not over 18 mm. Sec. 11982.  Wrist watch strap buckles over 18 mm. Sec. 11983.  Used cylinder heads. Sec. 11984.  Cylinder heads used solely or principally with certain engines. Sec. 11985.  Engine blocks. Sec. 11986.  Swirler assemblies for turbines. Sec. 11987.  Barrels for fuel mixing. Sec. 11988.  Injector assemblies for certain turbines. Sec. 11989.  Stem assemblies for certain turbines. Sec. 11990.  Tip assemblies for non-gas turbines. Sec. 11991.  High pressure fuel pumps. Sec. 11992.  Dry scroll vacuum pumps 364x333x485 mm. Sec. 11993.  Dry scroll vacuum pumps 297x260x420 mm. Sec. 11994.  Dry scroll vacuum pumps 254x260x420 mm. Sec. 11995.  Dry scroll vacuum pumps 181x140x358 mm. Sec. 11996.  Turbomolecular vacuum pumps. Sec. 11997.  Rotary vane vacuum pumps valued over $500 each. Sec. 11998.  Vacuum diffusion pumps valued over $900 each. Sec. 11999.  Hand- or foot-operated air pumps. Sec. 12000.  Roof vent fans. Sec. 12001.  12-Amp corded electric leaf blowers. Sec. 12002.  Cordless battery powered leaf blowers not exceeding 20 volts. Sec. 12003.  Cordless battery powered leaf blowers between 20 and 60 V. Sec. 12004.  Fan assemblies for cab climate systems. Sec. 12005.  Aquarium air pumps. Sec. 12006.  Heat pumps for residential use. Sec. 12007.  Heat pumps (outdoor units) for split air conditioner systems. Sec. 12008.  High-wall indoor units. Sec. 12009.  Single-zone outdoor units. Sec. 12010.  Mini heat pumps for split air conditioner systems. Sec. 12011.  Multi-zone outdoor unit ductless systems. Sec. 12012.  Indoor units of split air conditioner systems. Sec. 12013.  Ductless 18000 BTU heat pumps, single zone inverter. Sec. 12014.  Single-phase heat pump. Sec. 12015.  Steel vacuum pitchers with plastic hinged lid. Sec. 12016.  Oil filters. Sec. 12017.  Battery powered nasal irrigators. Sec. 12018.  Struts to absorb vibration. Sec. 12019.  Table saws (25.4 cm.), operable corded