20''- 22 base-square groove 1. For awning window 2. Made in ss 304, ss 201 3. Square groove, two- pivots pointed, straight arm or curve-surfaced arm 4. Biggest open angle 30 5. After 50, 000 times opening tests 6. Specification: 6 arms, length 20 , base width 22mm, arm thickness 3.0mm 100 pieces per box, export cardboard packing
