➢ Quick upgrade: Designed for the 3020-PRO MAX V2 & 4040-PRO CNC machine and the Genmitsu aluminium Z-axis assembly V2 kits. Upgrade your 4040-PRO with a more powerful router and this 69mm spindle mount. ➢High Quality Materials The spindle slide is made of precision machined aluminum for better rigidity and durability. High strength and designed for a long service life. ➢Reliable performance: increased stability and lower operating noise. Heavy duty fixing screws ensure the spindle is always horizontal. ➢Easy installation: after removing the standard slide by quickly replacing only 4 screws. Dimensions: outer dimensions: 88 mm x 98 mm x 36 mm; diameter: 69 mm, Weight: 0.59965735264 pounds, Manufacturer: Genmitsu