PRODUCT APPLICATION M8 Nut plugs have many uses, such as chairs, tables, closets, storage racks furniture foot protection, and other equipment such as fitness equipment, shelves, mechanical equipment and other metal pipes, plastic pipes. PRODUCT DETAILS Type: Round Plastic Caster Inserts with M8 Thread Material: Plastic Color: Black Overall Size: 3/4 x 7/8 inch / 19 x 22mm (Dia x H) Package Includes: 4 pcs x Plastic Inserts with M8 Thread PRODUCT ADVANTAGES1. The Tubing end cap is composed of premium polypropylene plastic, which is highly resistant to corrosion and wear. The plastic plug has an M8 thread and can be installed with a suitable height-enhancing pad or caster.2. The Round plastic caster inserts with M8 thread have ribs on the insert part to ensure a secure fit with the round tube without falling out. If the tube wall is too thick, you can also trim it to the right size and knock it in. INSTALLATIONThe plastic furniture legs glide plug It is easy to install and remove. It can be easily inserted into ducts with a gentle push or a tap with a small hammer.