Part # Shrink Ratio  Material  Temperature  Ratings 
FIT-221-MS-2 2:1  XLPO  -55 to 135  AMS DTL-23053/5 CL 1 Colors, AMS DTL-23053/5 CL 2 Clear, CA Prop 65, CSA 198 Except Clear, RoHS, UL 224 Except Clear 
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1) Tubing Type Heat Shrinkable Tubing (Assortment)
2) Tubing Material Cross Linked Polyolefin
Supplied ID
Recovered ID
Recovered Wall
FIT-221-1/4 0.250 0.125 0.025 4 x 6 IN
FIT-221-3/8 0.375 0.187 0.025 4 x 6 IN
FIT-221-1/2 0.500 0.250 0.025 4 x 6 IN
FIT-221-3/4 0.750 0.375 0.030 4 x 6 IN
1) UL Standard 224 (Except Clear) 600V 
2) CSA International Standard 198 (Except Clear) 600V 
3) Other AMS-DTL-23053/5 Class 1 (Except Clear) 
1) EU Directive 2011/65/EU(RoHS2):
 All materials used in the manufacture of this part are in compliance with European Directive 2011/65/EU regarding the restriction of use of certain hazardous substances in electrical and electronic equipment.
2) REACH Regulation (EC 1907/2006):
 This product does not contain Substances of Very High Concern (SVHC) listed on the European Union's REACH candidate list in excess of 0.1% mass of the item.
3) California Proposition 65:The outer surface materials used in the manufacture of this part meet the requirements of California Proposition 65.
Physical & Mechanical Properties
1) Temperature Range -55 to 135°C 
2) Shrink Ratio Approximately 2:1 
3) Full Recovery Temperature 121°C 
4) Minimum Shrink Temperature 90°C 
5) Tensile Strength 1500psi, Min ASTM D638
6) Elongation 200%, Min ASTM D638
7) Low Temperature Flex(-55°C) no cracking AMS-DTL-23053
8) Heat Shock(250°C,4hrs) no cracking AMS-DTL-23053
9) Secant Modulus 2.5x10 4 psi, Min ASTM D882
10) Longitudinal Change +/-5% AMS-DTL-23053
11) Specific Gravity(Colors) 1.35, Max ASTM D792
Specific Gravity(Clear) 1.00, Max 
12) Shelf Life 5 Years @ 18 to 35°C 
Electrical Properties
1) Dielectric Strength 500 V/mil, Min ASTM D876
2) Volume Resistivity 1x10 14 ohm-cm, Min ASTM D876
Chemical Properties
1) Water Absorption 0.50%, Max ASTM D570
2) Corrosion(0°C,16hrs) no corrosion AMS-DTL-23053
3) Fluid Resistance(23°C,24 Hrs) 1000 PSI, Min AMS-DTL-23053
4) Fungus Resistance Pass AMS-DTL-23053
5) Vacuum Outgassing - CVCM 0.10%, Max ASTM E595
6) Halogen Free No 
7) Lead Free Yes 

Alpha Wire FIT® Kits are great resources for use in R&D labs, engineering development, and maintenance departments. These kits provide heat-shrink tubing is various sizes and colors in pre-cut pieces up to 6". 

Additionally, our FIT-MGKIT-1 comes with a FIT MINIGUN so you can have everything you need to test our product at your fingertips.  We offer our kits in a variety of colors, sizes, shrink ratios and materials. 

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