DEC: 4015 Chain Hoist
6 6:1 reduced drive 
Wall mounted 
Includes:  
1)41B60 sprocket,1 Inch bore  
2)48 Inch  of #41 roller chain  
3)26' of hand chain  
4)Chain keeper  
5)1/4 *1/4  1 3/8 square key  

For Overhead Garage Door, Industrial Garage doors, Residential garage doors,Commercial garage door parts, sectional garage door parts, Rolling garage door parts, Sliding garage door parts.
GDP International Trade Co.,Ltd supply garage door hardware