qalo Men's Step Edge Ring - Charcoal / Size 10: Silicone Ring Qalo Men's Classic Black Ring Is Designed For Hardworking Hands. Exclusive To Qalo, This Unique Silicone Ring Is Functional For Even The Dirtiest Jobs In The Harshest Environments. Material: Q2X™ Silicone Material These Rings Fit True To Traditional Wedding Ring Sizes Tensile Strength: 42.2Lbs Of Force To Brake Temperature Tolerant From -75 Degrees;f To 575 Degrees;f Non-Conductive, Non-Porous Size 10 | Qalo Men's Step Edge Charcoal Silicone Ring - Size 10 - 1 Ring