Description: 【Easy to Use】: To use this Expansion Plug, simply select the appropriate size (high precision product, must be the right size to use). 【 Material】: Marine Boat Plumbing drainage plug is made of rubber and stainless steel materials that ensure durability and longevity of use. 【Package Includes】: Each package comes with 1 adjustable drain plug. Size Chart: Style A: Applicable pipe diameter range 100mm-110mm/3.94inch-4.33inch, hole diameter must be greater than 100mm/3.94inch to be used Style B: Applicable pipe diameter range 110mm-125mm/4.33inchx4.92inch, hole diameter must be greater than 110mm/4.33inch to be used Style C: Applicable pipe diameter range 135mm-150mm/5.31inchx5.91inch, hole diameter must be greater than 135mm/5.31inch to be used Style D: Applicable pipe diameter range 165mm-180mm/6.50inchx7.09inch, hole diameter must be greater than 165mm/6.50inch to be used Package Includes: 1 Rubber Expansion Plug Note: Please allow slightly errors 1-2cm differences due to manual measurement.