Plastic Ribbed for easy assembly and secure fitting. Prefect for a more professional finish on tubing enclosures on trailers, racking, shop fittings etc. Can also be used as furniture guides on furniture feet to help protect floor surfaces Product Mame: Rectangle Tube Insert Material: Plastic Color: Black Top Size: 20 x 40mm / 0.79 inch x 1.58 inch (L*W) Thread Size: 19 x 39mm / 0.94 inch x 1.57 inch (L*W) Overall Height: 17mm / 0.7 inch Net Weight: 272g Package Contents: 64 x Rectangle Tube Insert Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.