Its 5/32inch diameter nozzle and and approximately 0.4-0.5Mpa air pressure can create a fine that delivers bubble-free material and provides full coverage of the area Two cups(each of 33.82 oz in capacity) and a measuring cup(16.91 oz) allow for a large area of spraying without having to add paint frequently The air inlet valve on the body allows you to adjust the air volume according to your needs. And the trigger is infinitely adjustable, so you can easily adjust the amount of by varying the force of your hand pressure The gelcoat is made of quality aluminum alloy, brass, and Plastic, which is sturdy and This gel coat can be used to not only gel coats and resins but also other materials such as parting films, plasters, tool gel coats, primers that can be sanded, -reinforced gel coats, adhesives, and paints Color: As Shown Material: Plastic+Metal Package Contents: 1 x air-operated gel coat 2 x 1000 ml measuring cups 1 x 500 ml measuring cup 1 x lid 1 x nozzle 1 x air inlet 1 x brush 1 x wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.