2 pieces silicone seam roller with seam tester probe, this 2-in-1 design is more convenient than most single roller tools or two on the market; Use silicone rollers to apply uniform pressure to the seam to a smooth fit at the weld/bond, while seam tester probe allows you to quickly and easily check the seams immediately after rolling them out. roofing seam roller is made of silicone and measures about 40mm/ 1.57inch width, 35mm/ 1.38inch diameter, and seam tester is about 175mm/ 6.89inch length, anti- and withstand high temperature up to 260, and the wooden handle is 135mm/ 5.31inch length which is convenient for long-term operation and reduced fatigue. roofing roller smooths large flat areas to a smooth fit, and test probe allows you to quickly check the seams immediately after rolling them out, which nice adhesion for any seam tape product, ideal for PVC/ / EPDM woodworking, flooring, wallpaper installation, pipeline welding, pressure vessels, shipbuilding, automobile welding, etc. silicone seam roller with seam tester probe is easy to use, high reliability and portability, which allows you to roll out seam and test it with one hand completed simultaneously, saving time and effort, more flexible than large-scale detection equipment, suitable for on-site operations. silicone roofing seam roller is instant feedback on defects, reducing the risk of missed detection, great for leather seam, edge roller, leather edge creaser, smoother platen and wallpaper smoothing, which is an indispensable for DIY and professionals alike. Color: As Shown Material: Metal+Rubber Package Contents: 2pcs x seam roller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.