TOP QUALITY: The whole is made of high-quality stainless steel material, which is higher in hardness than ordinary materials. The material has the characteristics of moisture resistance, acid and resistance, and rust resistance. Rugged construction and shock- design extremely rugged. EASY TO USE: This Single Pulley Block is ergonomically designed. 360 degree rotation to prevent knotting of the rope and easy to use. The flexible pulley has capacity and is suitable for a variety of applications, with a load of 330Ibs. SUITABLE FOR: This M25 silver crane swivel hook designed for indoor and outdoor rope or rope applications, the flexible pulley with heavy duty capacity is suitable for a wide range of applications. TREATMENT: It is made of stainless steel, the is bright and shiny, it not release substances, it is environmentally friendly, non- and harmless. EXQUISITE TREATMENT: Package includes 6 pack single pulley roller.It's super sturdy and wear-, solid design, super load-bearing, flexible rotation. The production is very well-made, the pulley cylinder is strong and . Material:304 stainless steel colour:Silver Package Contents: 12 x M25 Single Pulley Block Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.