These are brass, imperial tail piece posts, suitable for Gibson and guitars using similar tail pieces with 5/16 inch threads

Please be aware - this is for 1 (one) post (not a pair)

Thread Spec
Length - 19.8374mm (0.781")
Thread - 5/16" - 24 UNC
Top section of post
Length - 14.4mm (5.4mm top, 1.3mm bottom, central section 7.7mm)
Diameter - 12mm Top and bottom section, 7.6mm middle section
Material - Brass
Weight - 15g