World War Supply K98 Mauser Leather Sling and 12" Cleaning Rod. Leather K98 Mauser Sling and steel 12" Mauser Cleaning rod. Note the cleaning rods are the correct length which is slightly longer then 12" but are commonly referred to as 12". Expertly Handcrafted Replica. Please check your Mauser to see if it takes a 12" or a 10" rod.