MT Valves & Fittings product. Available references and published specifications: • 88902025 — measures: SPARE PART - WATERTIGHTNESS O´RING EPDM TIMO7NC/70 25; weight (kg): 0.01; small / large box: 25 / 600 • 88902032 — measures: SPARE PART - WATERTIGHTNESS O´RING EPDM TIMO7NC/70 32; weight (kg): 0.02; small / large box: 10 / 320 • 88902040 — measures: SPARE PART - WATERTIGHTNESS O´RING EPDM TIMO7NC/70 40; weight (kg): 0.03; small / large box: 10 / 200 • 88902050 — measures: SPARE PART - WATERTIGHTNESS O´RING EPDM TIMO7NC/70 50; weight (kg): 0.04; small / large box: 10 / 160 • 88902063 — measures: SPARE PART - WATERTIGHTNESS O´RING EPDM TIMO7NC/70 63; weight (kg): 0.08; small / large box: 10 / 90 • 88902020 — measures: SPARE PART - WATERTIGHTNESS O´RING EPDM TIMO7NC/70 20; weight (kg): 0.01; small / large box: 25 / 1000 Price and local availability on request. Source: https://mtspain.net/en/spare-part-nbr-70-sealing-o-ring/