Check the listing for details. LE Wilson Neck Sizing & Full Length Sizing Die Bushing .306 in # B-306. Condition: New. Listed at 30.24 USD. LE Wilson Bushing for Neck Sizing or Full Length Sizing Die .306 in B-306 NEW!! This listing includes ONE Bushing The Neck Die Bushing fits in the Neck Die or Full Length Sizing Die and 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 Bushing Another 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 Diameter Example: .243 + .024 = .267 Now subtract .003 (.267 - .003 = .264 Bushing) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ All of our products are BRAND NEW in 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 within ONE 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.