friction stay side-hung design for casement window SS304, 22", 24" ... .0/2.5/3.0mm Square slot width: 22mm egress friction stay side-hung design for heavy duty casement window Material ... : 16mm, 18mmGroove width: 18mm, 20mm 1. 22mm square slot egress friction stay for heavy duty PVC steel window or aluminum window ... resistance to corrosion. 5.OEM service and custom design available. friction stay