Electric Slow Propeller 9*3.8：

²  Outer Dia. of Washer:  7.62mm

²  Available Inner Dia. of Washer:  2mm, 3mm, 3.175mm, 4mm, 5mm, 6mm Bore Inner Dia. (D1):  6mm

²  Height (H):  7.8mm

²  Net Weight:  11g

Electric Slow Propeller 9*4.7：

²  Outer Dia. of Washer:  7.62mm

²  Available Inner Dia. of Washer:  6.0mm, 5.0mm, 4.3mm, 3.5mm, 3.175mm, 3.0mm

²  Bore Inner Dia. (D1):  6mm

²  Height (H):  7.8mm

²  Net Weight:  8g

Electric Slow Propeller 9*6：

²  Outer Dia. of Washer:  7.62mm

²  Available Inner Dia. of Washer:  2mm, 3mm, 3.175mm, 4mm, 5mm, 6mm

²  Bore Inner Dia. (D1):  6mm

²  Height (H):  7.4mm

²  Net Weight:  9g