1/4 ounce (net weight) tube of Haynes Manufacturing Lubri-Film lubricant and sealant. Haynes Lubri-Film is a heavy duty sanitary lubricant with high load bearing, low friction properties. This lubricant is authorized by the NSF (rated H1) for use in food processing plants for incidental food contact. All ingredients are FDA approved. It will not dry or gum on your equipment. This is an excellent solution for use with silicone o-rings and valve seats.