5/16" W. x 5/8" H. x 94" L. Glazing channel not included with the extruded window frame, but sold separately. For single strength glass order glazing channel Model No. P7735 (Sku 267507), for double strength glass order glazing channel Model No. P7744 (Sku 267516). For corners see corner key Model No. PL14964 (262940) thru PL15030 (Sku 265965). 12-pieces per carton.