This Sliding Patio Screen Door Spring Tension Roller can be used as a top or bottom roller. It has a 1-7/8 inch (47.6 millimeter) steel housing with a high tension flat steel spring. The nylon wheel has a 1/4 inch (6.4 millimeter) center groove. This patio screen door roller is used by several patio door manufacturers.

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Housing Length: 1-7/8"

Housing Material: Steel

Roller Material: Nylon

Roller Outside Dimension: 1"

Roller Profile: Concave

Roller Width: 1/4"