... Introductionfloat PP ball: is made of standing up to chemical corrosion materials, such as polyethylene(PE),polypropylene (PP),reinforced polypropyleneRPP, ... is 60-150. It is widely used in petroleum, chemical, alkali-chloride, coal gas and environment protection, etc.1 ... mainly used in acid container,acid fog seal airtightness.MATERIALS:Polypropylene(PP) ect.SPECIFICATIONS:ø40mm, weight:18g per ...