BUM,BUK ,BUK-8A,BUK 10, BUK 12, BUM 12, BUM 20, BUK 20, BUK 15, BUM 15, BUM ... (mm) weight(kg) With componentsPrice per set(without bearing)BK-642 X 20 X 25 0.10Bearing, support blocks, ... 0.86Bearing, support blocks, nuts, cover, sleeve 140.00 BK-1580 X 25 X 50 1.11Bearing, support blocks, ... 2.24Bearing, support blocks, nuts, cover, sleeve 220.00 BK-25105 X 48 X68 2.91Bearing, support blocks, nuts, ...