Set of o-rings .set consists of 1. 1/2 inch female qrc o- ring, material-nbr, size : od-16 mm, id-12 mm, thickness-2 mm, qty-150 nos 2. 1/2 inch female qrc flat washer, material-nbr, size : od-20 mm, id-10 mm, thickness-3 mm, qty- 150 nos 3 .1/2 inch feed coupler flat washer ,material-nbr, size : od-22 mm, id-9 mm, thickness-3 mm, qty- 150 nos 4. kirloskar compressor 500 cfm diaphragm. material -neoprene ,maximum pressure -12 kg/cm2, size : bottom od-50 mm ,bottom id-48 mm, bottom