Made of aluminum material, these bolts and nuts are precision, sturdy, hard, durable for long time use. Easily removed and re-used. Proper for attaching shelf supports and brackets etc when assembling . These are must-have accessories in greenhouse. Features -Color: Silver -Material: Aluminium -Size: About 1.50X1.00X1.00cm/0.59X0.39X0.39inch - Made of aluminum material, these bolts and nuts are precision, sturdy, hard, durable for long time use. - These bolts and nuts are the standard bolt size used in the majority of greenhouses. - This is a good replacement when the part is damaged. Simply insert the bolts into the groove of the glazing and turns to lock securely in place when the nut is tightened. - Easily removed and re-used. Suitable for attaching shelf supports and brackets etc when assembling . - Not easy to break, corrosion or deform. A must have accessory in greenhouse. Package list: bolts nuts