The F221B1/4 CL100 from Alpha Wire is flexible clear heat shrink tubing with a 0.250" (6.35 mm) diameter, a 2:1 shrink ratio and a length of 4.00 ft (1.22 m).
The F221B1/4 BK203 from Alpha Wire is flexible black heat shrink tubing with a 0.250" (6.35 mm) specification, a 2 to 1 shrink ratio and a 0.083' (25.40 mm, 1.00") specification, sold in packs of 50.
The F221B1/4 CL203 from Alpha Wire is clear flexible heat shrink tubing, 0.250" (6.35 mm) diameter with a 2:1 shrink ratio, supplied in 250.0 ft (76.2 m) lengths.
The F221B1/4 BL203 from Alpha Wire is flexible blue heat shrink tubing with a 0.250" (6.35 mm) diameter, a 2:1 shrink ratio and a length of 250.0 ft (76.2 m).