CH105 // 0.30 x 22mm 30G CH106 // 0.40 x 22mm 27G CH107 // 0.50 x 22mm 25G Tip is flattened on the vertical plane. CH109 // 0.30 x 22mm 30G CH110 // 0.40 x 22mm 27G CH111 // 0.50 x 22mm 25G Tip is flattened on the horizontal plane.