Belden | PPC PST AquaTight Locking Terminator w/ Water Seal PST75WS - (50 Pack) AquaTight PST terminators guarantee the use of the proper port seal every time, keeping the moisture out, improving network performance and reducing costly service calls. PST locking terminator. Integrated port seal. 75 Ohm resistor. Specifications: Return Loss: -30 dB to 3 GHz minimum  Shielding Effectiveness: -120 dB minimum  Corrosion Resistance: Meets SCTE and Belcore per ATSM B117 (1000 hour salt fog)  Moisture Migration: Meets SCTE IPS-TP-013 (Red-dye moisture migration test)