# Reading the 38 × 74 × 37 mm Envelope on DAC38740037
The envelope to write on the ticket is 38 × 74 × 37 mm. That geometry belongs to DAC38740037, a wheel hub bearing / hub unit. Measure the removed part or the housing before you trust a faded stamp.
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Typical duty includes automotive hub units that call for this compact cartridge. Material on this listing is bearing steel. If your equipment sits outside that range, say so on the request rather than forcing a familiar part number.
Do not substitute DAC39740037, which shares the title but is a 39 mm-class envelope. Write 38×74×37 mm next to DAC38740037. A 39×74×37 unit will not press correctly on a 38 mm shaft.
Review DAC38740037 on the TFL Bearing Made-in-China listing. Shandong TFL Bearing Co., Ltd can confirm stock, packing, and any OEM marking once the drawing or sample is attached.