Product name: Concrete pump cleaning balls 1.The EVA/NBR foam materials are very environmental-friendly. 2.Good quality 3.Different size ,hardness, thickness 4.Various color Surface:Uniform surface Size:1 inch-8 inch all available, Other sizes and types upon customer¡¯s requirement Material:Sponge rubber Density: soft/medium/hard Shape:Round/cylindrical Application:Cleaning the pipeline of concrete pump and concrete pump truck in construction work Service Brand Schwing, PM, Kyokuto, CIFA, Sany, Zoomlion, and so on Name Concrete Pump Cleaning Ball size DN25(1inch)   soft ,hard ,medium soft DN50(2inch)  soft ,hard ,medium soft DN80(3 inch)   soft ,hard ,medium soft DN100(4 inch) soft ,hard ,medium soft   DN125(5 inch) soft ,hard ,medium soft   DN150(6 inch) soft ,hard ,medium soft DN180(7inch)   soft ,hard ,medium soft DN200(8inch) soft ,hard ,medium soft Other sizes and types upon customer¡¯s requirement Material Natural rubber Application Cleaning the pipeline of concrete pump and concrete pump truck in  construction work Service Brand Schwing, PM, Kyokuto, CIFA, Sany, Zoomlion, and so on