1) Material: steel, stainless steel (SUS304, SUS316) 2) Finish: ZP, BZP, HDG 3) Size: M4-M20, UNC 1/4"-3/4", BSW 1/4"-3/4" 4) Type:long spring,short spring,no spring. Inner packing/Carton dimensions: 35 x 20 x 10cm Outer packing:66ctns/pallet (112 x 80 x 80cm)