sr555SR555 Current Preamplifier. 10 VµA gain; 120 kHz (-3 dB) bandwidth; SR556 Current Preamplifier. 5 fA√Hz input noise; 1 VnA gain; SR556 Current Preamplifier. 5 fA√Hz inputIssued on Jan-19 Technical Data Sheet SYNTHETIC RUBBER ADHESIVE SR-555 DESCRIPTION SR-555 is a solvent borne, synthetic rubber based adhesive. MATERIAL