• 100% Polyester Thermal Bonded Refill • Solvent Resistant Against Fibreglass, Exterior, Emulsion & Latex Paint • 18mm Refill Pile By Knitted Production Procedure • 40mm Inner Diameter With PVC Stopper At Both End To Avoid Frame Rotating Blockage • Soften Virgin PVC Handle With 6mm Frame Rod & 5 Zinc Wire For Refill Locking