Features Wide Range of Applications：Universal transfer roller balls are suitable for electronics, hardware, mechanical, chemical, food, forests, mines, books, supermarket, rubber, etc.Mounting Hole Diameter: 4mm / 0.15 inch,Hole Spacing: 40mm / 1.57 inch Flexible Rolling: Transfer bearing balls can make plate, material bin or other objects glide flexibly.ransfer Bearing Ball is used for conveying, especially suitable for turning or diverging parts of conveying system.Diameter of Ball: 15mm / 0.59 inch Reduce the Labor :Transfer bearing balls can greatly reduce the labor intensity of workers.It can make items move easily in a horizontal direction.Size: 48 x 32 x 20mm / 1.88 x 1.25 x 0.78 inch Adjustable Density :People can set arbitrary distribution density according to different load requirements. Universal transfer roller balls are convenient to install. Conveying System :Transfer bearing balls are widely used in transmission system, processing system, processing machinery and packaging machinery ancillary equipment. Description: Transfer Bearing Ball is used for conveying, especially suitable for turning or diverging parts of conveying system. It can make items move easily in a horizontal direction. Features: Flexible rolling; make plate, material bin or other objects glide flexibly. Transfer roller Balls can greatly reduce the labor intensity of workers. Transfer bearing balls c an set arbitrary distribution density according to different load requirements. Transfer bearing balls are c onvenient to install. Transfer bearing balls are  suitable for electronics, hardware, mechanical, chemical, food, forests, mines, books, supermarket, rubber, etc. Transfer roller Balls can be  widely used in transmission system, processing system, processing machinery and packaging machinery ancillary equipment. Specifications: Housing Material: Iron Surface Treatment: Zinc plating Rolling Ball Material: Nickel Plating Steel Load Bearing: 15kg Mounting Hole Diameter: 4mm / 0.15" Hole Spacing: 40mm / 1.57" Diameter of Ball: 15mm / 0.59" Size: 48 x 32 x 20mm / 1.88 x 1.25 x 0.78" Quantity: 5 pcs Weight: 200g(approx.) Package Includes: 5 x Transfer Bearing Balls Note: 1, Accurate usage of installation is to make steel ball upward. Using in reverse often leads to stuck ball. 2, Please allow 1-3mm error due to manual measurement. Thanks for your understanding. Package List