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MDI manufactures three styles of plastic tube closures available in several sizes, materials and colors.
Unit of Measure


Round Glide Size

N/A 1 1/4 in1 1/2 in1 3/4 in2 in2 1/4 in

Fitting Tube Thickness for Round Glide

N/A 14 gauge16 gauge18 gauge19 gauge

Square Glide Size

N/A 3/4 in

Fitting Tube Thickness for Square Glide

N/A 18 gauge

Rectangular Glide Length

N/A 1/2 in3/4 in

Rectangular Glide Breadth

N/A 1 1/2 in1 1/4 in

Fitting Tube Thickness for Rectangular Glide

N/A 16 gauge18 gauge

Oval Glide Size

N/A 5/8 × 1 1/4 in

Fitting Tube Thickness for Oval Glide

N/A 16 gauge18 gauge


N/A Butyrate Polypropylene ABS (Acrylonitrile Butadiene Styrene)
Level GlidesLevel Glides
Adjustment KnobsAdjustment Knobs
Metal Threaded Adapters and Tube ConnectorsMetal Threaded Adapters and Tube Connectors
Plastic Components and Tube ClosuresPlastic Components and Tube Closures
Seating ComponentsSeating Components
Polyurethane MoldingPolyurethane Molding
Fixture and Display ComponentsFixture and Display Components

MDI manufactures and distributes quality products including industrial and furniture casters, industrial and office furniture glides and levelers, tube closures, tube connectors, adapters, plastic and metal hardware components. We also stock and offer wide array of adjustments knobs and seating components (bases, arms, foam, wood). We can produce polyurethane molded parts along with custom injection molded parts specific to your needs.