Get the best price for 24 or 36 month Bell 206 TT Straps: PMA and OEM Straps available. (small bore) P/N 206-310-004-101. P/N 206-011-154-105. P/N 206-011-147-005. (large bore) P/N 206-310-004-103. P/N 206-011-154-107. P/N 206-011-147-007. 1200 hour life Tension-Torsion Straps for all Bell 206A, 206B, 206B-1, 206L, 206L-1, 206L-3, 206L-4, OH-58A, OH-58A+, OH-58C