1.5 inch(1.5寸) 2-inch(2寸) 2.5 inches(2.5寸) 3-inch(3寸) 4-inch(4寸)

2 directional +20000 direction(2定向＋2万向) 2 directional +2 brake(2定向＋2刹车) 20000-way +2 brake(2万向＋2刹车) 4 orientations(4个定向) 40000 direction(4个万向) 4 brakes(4个刹车) 1 orientation(1个定向) 10000 direction(1个万向) 1 brake(1个刹车) [screw rod] 10000-way(【丝杆】1万向) [screw rod] 1 brake(【丝杆】1刹车) [screw rod] 40000-way(【丝杆】4个万向) [screw rod] 4 brakes(【丝杆】4个刹车) [screw rod] 20000-way +2 brake(【丝杆】2万向＋2刹车) [low center of gravity] 1 orientation(【低重心】1个定向) [low center of gravity] 10000-way(【低重心】1个万向) [low center of gravity] 1 brake(【低重心】1个刹车) 2 directional +20000 direction (with screws)(2定向＋2万向（配螺丝）) 2 directional +2 brake (with screws)(2定向＋2刹车（配螺丝）) 20000 direction +2 brake (with screws)(2万向＋2刹车（配螺丝）) 4 directional (with screws)(4个定向（配螺丝）) 40000 direction (with screws)(4个万向（配螺丝）) 4 brakes (with screws)(4个刹车（配螺丝）) 1 directional (with screws)(1个定向（配螺丝）) 10000 direction (with screws)(1个万向（配螺丝）) 1 brake (with screws)(1个刹车（配螺丝）)