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What makes the 3M Performance Spray Gun system different is the technology inside the quick-change replaceable nozzles. Because paint and coatings never pass through the body of the spray gun – and only the atomizing head – it’s like getting a brand new spray gun every time you swap the nozzle. Get the pattern control, atomization and transfer efficiency you expect from a premium spray gun — all while helping to drive more consistent spray performance across each job, every day. 3M Performance Gravity HVLP Atomizing Head Refill Kit includes five 1.4 size nozzles, ideal for clearcoat, solvent base color, single stage top coat, direct gloss, primer sealer, wet on wet primer, primer surfacer, high build primer. Warning: This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm.