Ancor Heat Shrink Tubing 1in x 12in - Yellow - 3 Pieces One Size. Most shrink tubing on the market reduces to a 2:1 ratio Ancor tubing shrinks to 3:1 which allows a wider range of applications for each tubing size.Features:Diameter: 1"Shrinks To: 1/4"Color: YellowPer Package: 3WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Package Contents: Ancor Heat Shrink Tubing Ancor 307924: Heat Shrink Tubing 1in x 12in - Yellow - 3 Pieces One Size