Pure DOW33 Grease for paintball markers and other o-ring lubrication applications. Recommended by most paintball marker manufacturers for extended performance and air efficiency. Same as the stuff that comes pre-lubricated in your marker. Also referred to as SL33K and GR33SE. Filled by volume to 1 fluid ounce. There are many different lubricants used in paintball markers, but only one is widely recommended by marker manufactures across the globe - DOW 33.This is the real stuff; no filler, no fancy colors or fruit scents/flavors. If you're looking for the best paintball lube on the market, it's right here. DOW33 light is also sold as SL33K and GR33SE.Important Note: Be aware that some retailers sell DOW 33 medium (a similar formula by Dow Corning that has a higher specific gravity and breakaway torque, a material characteristic that causes more friction/drag). Because of this, marker manufacturers do not recommend the use of DOW33 medium. Captain O-Ring only offers DOW33 light, the formula recommended by paintball marker manufacturers.