This is the Trident Tribolube 66 Syringe Lubricant Features: Tribulube 66 is a non-toxic oxygen compatible lubricant designed specifically for open circuit diving systems Tribolube 66 is a replacement for Christo-lube MDG 129. 66 2 ounce syringe Tribulube 66 is a non-toxic oxygen compatible lubricant designed specifically for open circuit diving systems. Tribolube 66 is a replacement for Christo-lube MDG 129. 66 2 ounce syringe