This product is a pack of 5x 6mm Mig welding tip adapter holders, designed to convert 4mm tips to 6mm contact tips. Made in China, these gas diffusers are suitable for most MB25 torches and are manufactured by the part number QH250405W. The compact package includes 5 units, each measuring 5cm in width and 1cm in height, providing a convenient solution for welding and metalworking tasks.