The gravity roller is typically used with Ready Tube® profiles or gravity roller mounting blocks and T-slot profiles to build custom material handling and conveyor applications. The roller has spring-loaded pins that snap easily into the holes of a Ready Tube® profile. The roller is aluminum with plastic inserts, making it a strong and durable option. There are lengths available to accommodate Ready Tube® frame openings from 15-27 inches (381-685.8mm) wide. If using Gravity Roller Mounting Blocks consult the block dimensional data for correct frame spacing.