We, Qing Dao Estar Imp & Exp Co., Ltd offer OIML R-111 Standard test weights, Class M1, M2, M3 of cast iron weights and Class E1, E2, F1, F2, M1 stainless steel calibration weights & weight sets. Nominal value range: 1kg, 2kg, 5kg, 10kg, 20kg, 25kg, 50kg, 100kg, 200kg, 250kg, 500kg, 1000kg(1t), 2000kg(2t), 5000kg(5t)...cast iron test weights/standard weights/block weights.1mg, 2mg, 5mg, 10mg, 20mg, 50mg, 100mg, 200mg, 500mg, 1g, 2g, 5g, 10g, 20g, 50g, 100g, 200g, 500g, 1kg, 2kg, 5kg, 10kg, 20kg, 25kg.& mg-g, mg-kg, g-kg stainless steel calibration weights/ weight sets.Our strenghs: 1 More than 20 years' factory weighing & casting experience.2 Comply for OIML R-111 standard.3 Plat surface & High accuracy.4 Durable quality & Low price.5 Shape: rectangular, roller, cylinder or as you required, OEM is avaiable.6 Widly used in industrial weights and laborator, chemical, medical calibration weights, commercial for all kinds of scales such as Analytical balance, floor scale, flat scale, weighing scale, Forklift Scales, weighbridges...