1、Polyurethane elastomers are characterized by high strength, high elasticity, small deformation and good stretching force. 2、Using polyurethane as die material can greatly shorten the time and cost of making die. 3、Low weight, machinability, corrosion resistance, exceptional impact resistance, typically good thermal and electrical insulating properties. 4、Polyurethane provides better tear and abrasion resistance and can be more readily bonded to another material. 5、Used for all kinds of machinery acting as a buffer or shock absorber, a ideal die spring. Features: Polyurethane elastomers are characterized by high strength, high elasticity, small deformation and good stretching force. Using polyurethane as die material can greatly shorten the time and cost of making die. Low weight, machinability, corrosion resistance, exceptional impact resistance, typically good thermal and electrical insulating properties. Polyurethane provides better tear and abrasion resistance and can be more readily bonded to another material. Used for all kinds of machinery acting as a buffer or shock absorber, a ideal die spring. Specification: Material: PU Color: Yellow External Diameter Inner Bore Diameter Length Weight Quantity #01 20mm/0.8inch 8mm/0.3inch 500mm/19.7inch 111g/3.9oz 2pcs #02 25mm/1inch 8mm/0.3inch 500mm/19.7inch 163g/5.7oz 1pcs #03 30mm/1.2inch 8mm/0.3inch 500mm/19.7inch 297g/10.5oz 1pcs #04 35mm/1.4inch 8mm/0.3inch 500mm/19.7inch 382g/13.5oz 1pcs #05 40mm/1.6inch 8mm/0.3inch 500mm/19.7inch 279g/9.8oz 1pcs Package List: Model Quantity #01 2pcs #02 1pcs #03 1pcs #04 1pcs #05 1pcs Note: Please allow slight error due to manual measurement. Thanks for your understanding.