Material: 60Si2MnA, 60Si2CrA, 55Si2Mn, 60Si2MnA Dimensions (L x W x H) (mm): Diameter 18 Rail Clamp, Diameter 18 Rail Clip Place of Origin: Jiangsu, China (Mainland) Brand Name: ALEX Model Number: Nabla Clamp, Nabla Type, E16, E18, E20 Surface: Bluing, Plain Oiled, Color Pained Raw Material: 60Si2MnA, 60Si2CrA, 55Si2Mn Fatigue life: 5 Million Times without Crack Partnership: Agents, Distributors are welcomed Quality Control: Inspection on Each Workshop Standard: DIN17221, BS970, GB/T1222 Hardness: 44-48HRC Packaging: Woven Bag/Kegs and Pallet of fumigation free Delivery: Shipped in 25 days after payment