The cover material is density polyethylene plastic, it can provide great buoyancy.The filled material is Polyurethane foamed plastic .The thickness ranges from 5mm--66mm. The polyethylene foam float usually cover outside the HDPE pipe and rubber hoses to provide great buoyancy.Constructed from 100% closed cells reticulated foam, embedded layers of high tenacity fabrics and hot sprayed elastomer skin coating, PE cylindrical floats are produced by rotational moulding Available in two halves with coupling bolts or in monolithic version without bolts.