Specifications: Product Name: Lacing System Material: Nylon, plastic Size: 39 * 29 *14mm Color: Black, Red, Customized pantone colors Accessories: Sew flange housing, lace guides, nylon steel rope Features: 1. QUICKLY Turn to tighten. Quick Release. Single hand one second. 2. COMFORT Exactly adjust tightness. With special lace guides. No any focus force on feet. 3. SAFE: Precision closure design. Not any loosen under application area. Reliable and safe.