Skip to Main Content


Expandable Braided Sleeving

MONOFLEX® PET FR is similar to our PET sleeving but with flame-retardant properties. This sleeving is universally known for having excellent abrasion resistance and is made of polyethylene terephthalate, a thermoplastic polyester, and is durable against heat operating up to 125°C. The particular design and expandability allow for simple and efficient installation over connectors. 

Currently we only offer MONOFLEX® PET FR for online purchase in black with a white tracer; however, we do manufacture a wide range of colors. If you are interested in exploring other colors or patterns for customization, please contact us for assistance. All 25 FT lengths offered online are splice-free and all ID sizes 1/2″ and smaller are offered rounded.

Price per foot:
SKU: N/A Category:

Features of MONOFLEX® PET FR

  • Offers a high expansion ratio and excellent mechanical abrasion resistance
  • Flame Retardant
  • Maximum Operating Temperature: 125°C / 257°F
  • UL Temperature Rated (File #E118600) and CSA Temperature Rated
  • UL VW-1 Rated (File #E118600) and CSA FT1 Rated
  • Available in several colors, patterns, and custom constructions
  • REACH and RoHS Compliant
  • Common Applications: Automotive, Marine, Heavy Equipment, Industrial, and Electronic Wire Harness
  • Direct match to Alta Technologies Flex-Guard™ FPE (953 series)
Download MONOFLEX® PET FR Datasheet    

Testing Data for MONOFLEX® PET FR

Abrasion ASTM D-4060 3,500 cycles
Low Temperature Flexibility ASTM D-3045 No Cracking or Deformation


Temperature Scale for MONOFLEX® PET FR

Maximum Operating Temperature 125°C / 257°F
Melting Point 230°C - 260°C / 446°F - 500°F


Monofilament Properties of MONOFLEX® PET FR

Single-Strand Diameter 0.010"
Density 1.38 g/cc
Single-Strand Tensile Strength 8.5 lbs.
Moisture Absorption 0.20%



The suggested application is provided by Atkins & Pearce merely as an additional tool to assist the customer in making an appropriate expandable sleeving selection. This is only provided to serve as suggestions of expandable sleeving that may be appropriate based on certain criteria and should not be relied upon as determinative or as a substitute for customer testing.

Many variables exist in a sleeve’s flexibilities, resistances, and treatment. Final sleeving product selection should always be confirmed through the customer’s own testing process to determine if a particular product is the correct choice for a particular system. Atkins & Pearce is not responsible for selections made by the customer using any of the reference material provided. For optimal performance in specific systems, we strongly recommend that customers conduct exhaustive electrical tests in their own lab and consider retaining samples for their future internal reference. The importance of expandable sleeving product testing and data validation cannot be overstated.

As the customer, you and your company are responsible for appropriately testing all Atkins & Pearce expandable sleeving used in your application and for making the final selection based upon meeting appropriate safety and electrical standards. Atkins & Pearce makes no representation or warranty, expressed or implied, at law or in equity, in respect of the information provided, including, without limitation, with respect to merchantability or fitness for any particular purpose, which representations or warranties are hereby expressly disclaimed.

Weight 10 lbs
Dimensions 5 × 5 × 5 in

1/8", 1/4", 3/8", 1/2", 5/8", 3/4", 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/2", 3"


25 ft, 100 ft, 250 ft, 500 ft


Black, Black with White Tracer, White, White with Black Tracer

Note: MONOFLEX® PET FR is currently only available for purchase online in select sizes. We also only offer our black with white tracer product for purchase online currently. If you are interested in exploring our wide variety of other colors, please contact us for assistance.

Sizes Available

1/8" * 1/4" 0.025" 558.06'/lb. 1,000' **
1/4" * 3/8" 0.025" 372.04'/lb. 1,000' **
3/8" * 1/2" 0.025" 165.35'/lb. 500'
1/2" * 3/4" 0.025" 124.01'/lb. 500'
5/8" 1" 0.025" 107.21'/lb. 250'
3/4" * 1-1/4" 0.025" 82.67'/lb. 250'
1" * 1-5/8" 0.025" 74.41'/lb. 250'
1-1/4" * 1-3/4" 0.025" 62.00'/lb. 250'
1-1/2" * 2-1/8" 0.025" 46.50'/lb. 250'
1-3/4' * 2-3/4" 0.025" 37.20'/lb. 250'
2" * 3-1/2" 0.025" 29.76'/lb. 200'
2-1/2" 3-5/8" 0.025" 24.00'/lb. 100'
3" 4-3/4" 0.025" 24.80'/lb. 100'

Notes: * = MONOFLEX® PET FR is currently only available for purchase online in these select sizes. ** = These spool lengths are not currently available for purchase online. If you are interested in exploring an unavailable or custom size, or a spool length not currently available online, please reach out through the button below for assistance from our Sales & Marketing Team.

Excellent4.7 Based on 12 reviews from review us onEMTKEMTK ★☆☆☆☆ Iam Arun Jayapal from CRI, Very tough to contact even if you convey that your situation is hard, Robin will just share useless contact, through which we cannot communicate with him. I was asking his whatsapp , messanger or any easy communication method, since iam from INDIA. But he reply with same useless contact, because only then he can escape from answering.Tom WinklerTom Winkler ★★★★★ Site was easy to navigate, trust me that means a lot, they had what I needed, got it ordered, shipped and delivered, no worries.Tracy CulpTracy Culp ★★★★★ Great product and timely customer service.TRACE CULP, CFO, AIRCRAFT & COMMERCIAL ENTERPRISES, INC.Christina MorganChristina Morgan ★★★★★ Working with Atkins & Pearce is a great exerience! They have excelletnt cusotmer service through the whole process from quoting to receiving product. Always on time and at a reasonable price.Gary SheriffGary Sheriff ★★★★★ David BrecountDavid Brecount ★★★★★ Great company to work with. The team is very responsive and talented!James KleinerJames Kleiner ★★★★★ In and out. No waiting on unloadingjs_loader