Our range of 13 rods teacher abacus - 103 is manufactured from quality raw material and is available in various colors. Outer frame is made out of 18 mm seasoned rubber wood with front side curved edges. We use special coat paint for the frame. Beads and rods are of quality raw material. We use rubber ring to have feather touch feeling on the outer side of the beads. We use stainless steel springs to hold the beads. We provide tiltable stand at the bottom of the frame. We also provide movable decimal points and strap to hand the abacus at the wall.