1) Speed the nipple assembly into bicycle rim or motorcycle rim up to 350 sets of 8 hours. 2) This machine could apply for differecen depth of double wall of rim by changing the screwdriver set from 0~30mm. 3) CE certificated by SGS. 4) 220V; 50/60Hz, Single phase. 5) There are different models for 9G, 10G, 11G, 12G, 13G, 14G, respectively.