General description 12pcs Tyre Changer Part Nylon Mount Demount Head Duck head Insert Rim Protector is designed to protect tire rims from scratches during tire changes. The inserts are shaped to fit the duck head and the edge of the rim, making them easy to use. Technical specifications Color: Yellow Material: Nylon Type A Length: 54mm, Thickness: 4mm Type B Length: 44mm, Thickness: 4.2mm Measurement allowed error: +/- 1-3 cm Compatibility and accessories Package includes: 60 x Duckhead Tire Changer Head Rim Protectors (Type A) 60 x Tire Changer Head Rim Protectors (Type B)