MODEL NO 1：
Material:Aluminium
Internal diameter:48mm
MODEL NO 2：
Material: Aluminium
Internal diameter:55mm
MODEL NO 3：
Material:Iron (plated zn)
Internal diameter:50mm
MODEL NO 4：
Material: Iron (plated zn)
Internal diameter:52mm
MODEL NO 5：
Material: Aluminium
MODEL NO 6：
Material: Aluminium
MODEL NO 7：
Material: Aluminium
Internal diameter:38mm
MODEL NO 8：
Material:Stainless steel
Internal diameter:48mm
MODEL NO 9：
Material: Aluminium
Internal diameter:44mm
MODEL NO 10：
Material: Iron (plated zn)
Internal diameter:24mm
