Marvin Old Style Casement / Casemaster Roto-Gear Operator LH 10815500
Marvin Casemaster, Awning, French Casemaster, Venting Window - LEFT HANDED / LH -10815500 Casement Window Crank Mechanism. Also known as the Marvin Casement Window Dual Arm Roto-Gear Operator - "B" Dimension is 4 7/16" Long.
IF YOU HAVE THE "SHORTER LENGTH ARM ( 2 7/8" ) see this link:
THIS REPLACES THE OLD STYLE UNITS THAT INSTALL UNDER / THROUGH THE BOTTOM SILL STOP. Special Order Units - as shown in pictures. Handles and covera are sold seperately..
If You Are Uncertain .. or Need Other Parts Email: Info@MarvinWindowDoorParts.com