4pcs T-shape Button Bass Tuner Machine Head Tuning Pegs New and high quality. Machine heads suitable for acoustic steel string bass The tuning machines turn smoothly enabling the player to tune accurately and easily Zinc alloy material, colored in black. Heavy duty internal gear Material: Metal. Color: Black. Weight: 264g / 9.31oz Package Includes 1 x 4pcs T - shape Button Bass Tuner Machine Head Tuning Pegs