7002: Glass in balls exc microspheres of 70.18 rods or tubes, unworked

700210: Balls, glass exc microspheres of No 70.18 700220: Rods, glass 700231: Tubes of fused quartz or other fused silica 700232: Tubes of glass linear coef of exp </=5X10-6 per Kelvin within 0C-300C 700239: Tubes of glass nes 7002: Glass in balls exc microspheres of 70.18 rods or tubes, unworked