Part # Shrink Ratio  Material  Min Supplied ID  Max Recovered ID  Nom Recovered Wall  Temperature  Ratings 
FIT-221L-3/4 2:1  LSZH  0.75  0.375  0.027  -55 to 125  CA Prop 65, REACH Regulation, RoHS, UL 224, UL VW-1 
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1) Tubing Type Heat Shrinkable Tubing
2) Tubing Material LSZH Polyolefin
3) Minimum Supplied ID(In) 0.750
4) Maximum Recovered ID (In) 0.375
5) Nominal Recovered Wall Thickness(In) 0.027
6) Color(s) BLACK
1) UL Standard 224 125°C / 600 VRMS
 VW-1 
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. Consult Alpha Wire's web site for RoHS C of C.
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. For up-to-date information, please see Alpha's REACH SVHC Declaration.
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 125°C 
2) Shrink Ratio Approximately 2:1 
3) Full Recovery Temperature 110°C 
4) Minimum Shrink Temperature 100°C 
5) Tensile Strength 1500psi, Min ASTM D638
6) Elongation 200%, Min ASTM D638
7) Low Temperature Flex(-30°C) no cracking AMS-DTL-23053
8) Heat Resistance(158°C,168hrs) 100% Elongation, Min ASTM D638
9) Heat Shock(250°C,4hrs) no cracking AMS-DTL-23053
10) Secant Modulus 2.5x10 4 psi, Min ASTM D882
11) Longitudinal Change +/-5% AMS-DTL-23053
12) Shelf Life 25 Years @ 18 to 35°C 
Electrical Properties
Chemical Properties
1) Water Absorption 0.70%, Max ASTM D570
2) Copper stability(158°C,168hrs) 100% Elongation, Min UL 224
3) Corrosion(158°C,16hrs) no corrosion AMS-DTL-23053
4) Halogen Free Yes 
5) Lead Free Yes 
Packaging 
1) 200 FT CR19-1:    19.75 x 1 x 8    Max. 3 pieces/Min length 25 FT.

Our FIT heat-shrink tubing offers a reliable way to protect and seal terminations or add additional mechanical ruggedness. FIT preferred heatshrink products are made from premium compounds under the tightest manufacturing controls. This means FIT will consistently have excellent physical characteristics such as low longitudinal shrinkage and wide temperature ranges while providing an elegant appearance when used alone or on OEM equipment.

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