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Gerkin is a window and door manufacturing company that has been around since 1897. They have several commercial window styles and doors in the Rhino line. Each Rhino window reflects the design and manufacturing expertise they've utilized over the years. Besides having several window styles, their window and door series make up of a commercial horizontal slider, casement, single hung, double hung, hopper, awning, fixed, and patio door. They also have an alternative line of windows called the G-line which consists of a few different styles: sliding glass doors, fixed windows, patio doors and tilt turn windows.

Gerkin makes more than just windows and doors; they also manufacture interior and exterior trim packages such as columns, trims, mullions and sills. They offer custom manufacturing as well to accommodate any size or shape frame including curved frames. They also manufacture pre-hung entry systems as well as hinged units that are able to be used on garage doors or patio doors.