Check the listing for details. LE Wilson Neck Sizing & Full Length Sizing Die Bushing .288in B-288. Condition: New. Listed at 30.24 USD. LE Wilson Bushing for Neck Sizing or Full Length Sizing Die .288inB-288NEW!!This listing includes ONE BushingThe Neck Die Bushing fits in the Neck Die or Full Length Sizing Dieand sizes the case neck to grip the bullet.To figure out what size to order... Measure the diameter of a loaded round where the bullet sits in the neck (Ex. .268). Now subtract .002 to .003 from that number..268 -.002 = .266 BushingAnother way is to measure your wall thickness and multiply by 2 and add bullet diameter.Then subtract .002 to .003 from that number..012 Wall Thickness x 2 = .024.243 Bullet DiameterExample: .243 + .024 = .267 Now subtract .003 (.267 - .003 = .264 Bushing)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~All of our products areBRANDNEWin the box; and contain all of the parts,materials and documentation.You can expect and will receive prompt delivery of your item.We will ship your order withinONE DAY! We are unable to accept returns on used, fitted, or altered parts. Returns must be in new, unused condition and in their original packaging.