Similar to Series 10UP with the exception of having a higher and wider tongue (groove is 3/16" x 1/2"). Used in schools, institutions and hotels on 1 3/4" sash. Always recommended for 2 1/4" sash. Thickness of material: Zinc - .018": No. 1X is also available in .028" and .045". Bronze material is .020".
Stock sizes; 32",36",42",48",60",64",72",86",96" plus 1/2"