All Categories > Hollow Steel Precision Balls > Hollow Aluminum Precision Balls > Item # 3400.375HA. Item # 3400.375HA., Hollow Aluminum Precision Balls Request Information Email This Page Download PDF Download PDF Printable Page Close Window Unit of Measure Imperial Metric Both Specifications Size N/A 3/8 in9 21/40 mm Material Resin N/A Hollow Bead Finish N/A Aluminum