BILT Matrix Premium 5 Subject Notebook-A4, Single Ruled . From the Manufacturer .Natural Series introduced by Bilt in the Matrix premium notebooks category, is having Royal Executive Bond Camelle off-white paper.Wiro-binding and a pen holder on the back cover, for ease of use and convenience .Speciality hi-bright, high opacity paper .Wiro-binding and a pen holder on the back cover, for ease of use and convenience