The KH204SS HMS SuperSafe aluminum carabiner from ISC features a breaking strength of 27kN.
 
Height:  122mm 
Width:  74mm 
Thickness:  18mm 
Weight:  100g
Gate opening:  23mm 
MBS Gate Closed:  27kN
Proof Loaded:  12kN
Source:  Wales UK
Material: Aluminum
Country of Manufacture: Great Britain