MCM Sunglasses. Series number: MCM721SLB. Color code: 971. Shape: Square. Lens Width: 58 mm. Lens Bridge: 16 mm. 100% UV protection. Frame Material: Acetate. Frame Color: Crystal;Pink. Lenses Type: Grey Gradient. Rim Style: Full-Rim. UPC/EAN code: 8809735083348. MCM Grey Gradient Square Ladies Sunglasses MCM721SLB 971 58.