100%silicone , pass the FDA,SGS. it can be printed or debossed logo , any color is OK. The 7.2cm length ,the middle thickness 0.4cm , the 2 sides thickness 0.7cm , 1.5 cm width at the smallest middle point , 2.5 cm at the widest part of width ,weight 6.5g . Silicone Cable Winder