The F3501/4 CL103 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' (1.22 m).
The F3501/4 CL067 from Alpha Wire is flexible clear heat shrink tubing with a 0.250" (6.35 mm) diameter, a 2:1 shrink ratio, and a 0.500' (152.40 mm, 6.00") length.