Material: Plastic; Overall Size: 90x18.5mm / 3.5x0.7 inch (L*W); Adjustable Length: 34-58mm /1.3-2.3 inch; Quantity: 5 PCSAdvantage: The adjustable height golf tee is crafted from durable plastic material, delicate, sturdy, and durable, and resistant to break or bend, offering high impact strength. The adjustable height features a large club head design, effectively decreasing the contact area between the tee and the ball. This helps to reduce friction when hitting the golf ball greatlyInstruction: Place the golf tee on the grass or mat, then put your ball on the tee's top.Application: This adjustable plastic golf tee can adjust its height from 1.3 inch to 2.3 inch according to your needs. Simply insert the triangular disc into the slot of the ball tee and rotate it to adjust the heightNote: The golf tee's height is important, please check which height you would need before buying.