4 oz. push cap bottle. PrOlix is a penetrating solvent used in industry, and rated the safest, most effective agent. Based on citrus technology (it has a pleasant, mild smell in contrast to petroleum based solvents), it is biodegradable and ozone-safe. We do recommend that you test on plastics, in a small area (on the back side). If no adverse action is noticed, you may continue with complete confidence. Another benefit of using PrOlix is that total disassembly is not required. The solvent seeks out dirt, oils, grime, etc. (even in small and impossible areas) and floats it away. The chemical action during cleaning develops the DRY lubricant and it is drawn into the pores of the material, creating a skin of protection.