The 5136C BK199 from Alpha Wire is a 12-conductor multi-pair cable (6 twisted pairs) with 18 AWG conductors, black jacket and foil and braid shielding, supplied in 1000.0 ft (304.8 m) lengths.
The 5136C SL199 from Alpha Wire is a 12-conductor multi-pair cable with 6 twisted pairs, 18 AWG, in slate with foil and braid shielding. Pack size 1000=1000 (unexplained).
The 5136C SL001 from Alpha Wire is a 12-conductor multi-pair cable with 6 twisted pairs, 18 AWG wire, slate jacket and foil and braid shielding, sold in 1000.0 ft (304.8 m) lengths.
The 5136C SL005 from Alpha Wire is a 12-conductor (6 pair twisted) multi-pair cable in slate, 18 AWG, with foil and braid shielding, supplied in 100.0 ft (30.5 m) lengths.