1/2 inch Pro Polespear Band / Sling with NTR Inserts and Spectra Cord Wishbone (Select Length) Size:1/2 inch(13mm) x (select your length) *custom indicates made to order Rubber: Powerful 1/2 inch OD x 1/4 inch ID American made rubber Wishbone: 1.9mm Spectra cord Terminals: NTR Inserts allow for easy wishbone length adjustment or replacement