S&T ST-57 Hop Up Unit Set
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Manufacturer: S&T
S&T Hop Up Unit Set. Suitable for ST-57 models.
Original spare part numbers: U19, U20, U24 27
We apologize for the picture quality. The article is white / transparent and is difficult to show before white
S&T Hop Up Unit Set. Suitable for ST-57 models.
Original spare part numbers: U19, U20, U24 27
We apologize for the picture quality. The article is white / transparent and is difficult to show before white
![](/catalog/images/b-sundt-parts-st57-hopup-unit-details1.jpg)
![](/catalog/images/b-sundt-parts-st57-hopup-unit-details2.jpg)