Expanding Rubber Stem Dimensions

Expanding Rubber Stem Details for Square & Round Tubing
Stem #ID of TubingRubber Range ( smallest size to largest size )
ER93/4″.720″ to .851″
ER277/8″.852″ to .927″ ( fits 1″ O.D. 16 or 18 Gauge )
ER281″.928″ to 1.029″
ER291 1/8″1.030″ to 1.140″
ER171 1/4″1.178 to 1.303
ER251 3/8″1.360″ to 1.425″
ER261 1/2″1.426″ to 1.589″ ( fits 1 5/8″ O.D. 16 or 18 Gauge )
ER211 13/16″1.790″ to 1.850″
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