OTTO Excavator Parts Ex300 6Sd1T Valve Spring Small 1125620326 112562-0326 1-12562032-6 For Isuzu OTTO Isuzu EX300 6SD1T Valve Spring Small 1125620326 – 100% genuine OEM-grade small valve spring, precision-fit for Isuzu 6SD1T engines. Bulk in-stock with fast global shipping, ideal for wholesale & agency partners. Superior elasticity & fatigue resistance vs. generic aftermarket small springs, cuts rework/returns, boosts resale profit margins. Reliable cross-border supply for long-term B2B cooperation.