Diameter: 8.5mm, 12.5mm, 25.4mm. 
Length: 145mm, 320mm, 345mm, 590mm, 850mm

DS-145: 20PCS/set
DS-145A: 1PC/set
DS-145B: 2PCS/set
DS-145C: 3PCS/set
DM-345: 10PCS/set
DX-320: 5PCS/set
DX-590: 5PCS/set
DX-850: 5PCS/set