Iglobalbuy 1.57" Pressure Silicon Roller For Hot Air Plastic Welder 1.18"(30mm) dia X 1.57"(40mm) wide silicone roller Wood+metal+heat-resistant silicone construction( The heavy fork doesn't bend or twist from pressure) Ball bearings for long lasting tool and smooth precision rolling Wallpaper seams and theangle pressing to preven cracks at the seams and edges Perfect for any type of seam pressure rolling,such as joining, welding or repairing flexible PVC, plastic materials (eg.PVC Banners )