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Ball transfer unit - GN 509
The GN 509 ball transfer units are available in one of three styles. The GN 509-SBL features steel balls, the GN 509-SKU features acetal resin-based (POM) technopolymer balls and the GN 509-SNI features stainless steel balls. All feature zinc-plated steel retaining components and felt seal for the dimensions 22 and 30. Buyers can request a stainless steel body and balls (GN 509-NNI).