Quick view Superlok Superlok FNPT 210 Series Ball Valve - 316SS -53 ºC to 21 ºC at 1000PSI- Various sizes - 1/4", 3/8", 1/2" 2 reviews The 210 series Superlok ball valve has a compact design with tight, low torque operation. MSRP: $61.34 Was: Now: $37.49 - $61.34 Options