Taco Pro-Fit - IMP-B-100

LOW: (MATCHES ORIGINAL PERFORMANCE CURVES) BELL & GOSSETT - 118668 ST, 118436 BR, 189128 NF ARMSTRONG - 816556-011, 816556-041, 816556-111 FITS FOLLOWING: BELL & GOSSETT - 2", HV, HV-NEW ARMSTRONG - H-32