Aluminium barrel with metal caps single component applicator gun is for Silicone Sealant/ Polyurethane Sealant sausage foiled pack 600ml sachets/ sausage. Smoothly squeeze the sachets/ sausage. High performance caulking gun/silicon gun with changed designs for efficient and smooth usage. Heavy Gun Good Performance Highly durable gun with effortless working for 600ml sealant pouches generally used for filling gaps in window frames. Care Instructions: Spring action might be a little stiff , please be patient while pulling back Package Contents: 1 Sausage Caulking Gun for 600 ml silicone sealant. Plus 1 Noozle