The F221B1/8 CL206 from Alpha Wire is clear flexible heat shrink tubing with 0.125" (3.18 mm) diameter and 2 to 1 shrink ratio, 0.167' (50.80 mm, 2.00") long, sold in packs of 50 pieces.
The F221B1/8 BK100 from Alpha Wire is flexible black heat shrink tubing with a 0.125" (3.18 mm) diameter, a 2:1 shrink ratio, and a 4.00' (1.22 m) length.
The F221B1/8 CL100 from Alpha Wire is flexible heat shrink tubing with a 0.125" (3.18 mm) diameter, 2:1 shrink ratio, in clear, supplied in 4.00 ft (1.22 m) lengths.
The F221B1/8 BK206 from Alpha Wire is flexible black heat shrink tubing with a 0.125" (3.18 mm) diameter and 2:1 shrink ratio, sold in packs of 50 pieces, with a 0.083' (25.40 mm, 1.00") measurement given.
The F221B1/8 BL206 from Alpha Wire is flexible blue heat shrink tubing with a 0.125" (3.18 mm) diameter, a 2:1 shrink ratio and a length of 500.0 ft (152.4 m).