Check the listing for details. Serious Steel Barbell Olympic Adapter Sleeve (8" Adapter Sleeve for 1" Bars). Condition: New. Listed at 9.90 USD. Serious Steel Fitness Olympic 8" Adapter SleeveTurn your 1" standard barbell or weight post into a 2" Olympic bar or weight post. Great for older style barbells, curl bars and plate loaded weight machines.Includes 1 allen key to tighten and loosen the metal hex nut.Made from heavy-duty nylon with a steel hex bolt.End cap is REMOVABLE for use with longer 1" standard posts!Tip: Use Barbell Collars as weight stopper to keep your plates exactly where you want them and to ensure they do not slip off when you are training.The Removable Cap allows the sleeve to still be compatible with even those extra long 1" posts or sleeves.Steel FastenerOur Serious Steel Adapter Sleeves include a Steel Fastener for added durability. Our sleeves were designed specifically with a steel fastener to help prevent stripping and keep them working in your gym for year after year. Please still refrain from overtightening.Heavy-Duty NylonConstructed of Heavy-Duty Nylon our sleeves are made for maximum strength. They will hold up against 45lb Plates and your daily training regimen.Removable CapOur Adapter Sleeves come with a Removable Cap. This is a necessary feature that allows the sleeve to still be compatible with even those extra long 1" posts.