Is there any reason these can't/shouldn't be used for an Autoblock?

I use it as such every day in the trees. Works great

Did they switch from kevlar to technora on these because it makes harder to tell if it has uv damage?

The original hollow block was made with a fiber called Twaron & when it was no longer available we switched to Technora which does not change the performance of the item. The only way to be certain about degree of strength loss due to UV damage would be destructive testing, and other factors would need to be considered (i.e. amount of use etc.). We ask customers to decide on usage based on the information given in the user document.

How is this measured? 19 inch circumference or 19 inches when stretched out??

Hello, This is 14 inches stretched out.

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Sterling 6.8mm HollowBlock2 13.5" Loop

Product ID: 125403143

Details

Material
Aramid Fiber
Color
Natural
Brand
Sterling Ropes
Style
Unique
Item Display Dimensions
13.5 x 0.44 x

🧵6.8mm hollow-braid tech

⚖️3,147 lb MBS strength

🛡️100% Technora fiber durability

£41.65

Duties & taxes included

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Description

🧗‍♂️ Elevate your grip game with the HollowBlock2 – where strength meets precision.

PRECISION GRIP - Hollow-braid design ensures flawless prusik and Klemheist knot performance on ropes 7mm+.
TRUSTED BY PROS - Sterling’s bestselling friction hitch, now stronger and more resilient for serious climbers.
HEAVY DUTY STRENGTH - Rated to withstand 3,147 lbs (14 kN) for ultimate safety and reliability.
UNMATCHED DURABILITY - Reengineered with aramid fiber for next-level abrasion resistance and longevity.
COMPACT LIGHTWEIGHT - Slim 6.8mm diameter and 13.5-inch length for easy handling without bulk.

The Sterling 6.8mm HollowBlock2 Loop is a premium friction hitch accessory crafted from 100% Technora aramid fiber, delivering superior abrasion resistance and durability. Designed for use as a prusik or Klemheist knot on ropes 7mm or larger, it boasts a massive 3,147 lb (14 kN) minimum breaking strength, making it a trusted choice for climbers seeking reliable performance and safety.

Specifications

ASIN	B07KRNJHZQ
Brand	Sterling
Brand Name	Sterling
Color	Tan
Customer Reviews	4.8 out of 5 stars 145 Reviews
Global Trade Identification Number	00846604042721
Item Diameter	6.8 millimeters
Item Display Dimensions	13.5 x 0.44 x 0.44 inches
Item Length	13.5 inches
Item Thickness	6.8 millimeters
Line Weight	3147 pounds
Manufacturer	Sterling Ropes
Manufacturer Part Number	SC060TNHB013
Material	Technora
Material Type	Technora
Maximum Tension Load	175 pounds
Model Number	SC060TNHB013
Number of Items	1
Product Style	Unique
Recommended Uses For Product	Climbing
Style	Unique
Tensile Strength	175 pounds
UPC	846604042721
Unit Count	1.13 Feet

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